uk: Комп'ютерні науки

description: HERMOSA: Supporting the UN decade on ecosystem restoration utilizing geo- and earth observation technologies The United Nations declared 2021 to 2030 as Decade on Ecosystem Restoration [Verlinken: https://www.decadeonrestoration.org/ ] in the hope of being able to avert the worst effects and limit the heating of the planet to 1.5 °C in comparison to pre-industrial times. The companies mundialis and terrestris from Bonn, Germany are developing a digital, internet based platform supporting urgently needed ecosystem restoration efforts by utilizing geo- and earth observation technologies. The project is financed by the European Space Agency (ESA). The platform is called HERMOSA, an acronym for Holistic Ecosystem Restoration Monitoring, repOrting, Sharing and mArketplace. From a technical point of view, the platform makes use of SHOGun, an Open Source WebGIS framework that uses react-geo and OpenLayers on the clientside, and GeoServer, actinia and GRASS GIS on the server-side to name just a few. The platform helps registered users to analyze the efforts that organizations face on the ground when restoring ecosystems with a web-based geographical information system. Beside the WebGIS there are modules for on-demand and automatic analysis of Sentinel1 and 2 data, but also the use of very high resoluted (VHR) satellite images is possible. The analysis tools offer a change detection or a land cover classification for example. The main challenges we had to cope with is to deliver a user-friendly tool, that allows users to easily perform complex analysis and to support them in interpreting the results. We'll have a look at some of the decisions that were made in that respect. The talk will on the one hand focus on the technical base of the platform but we will also show some of the functionality from the users and from the developers perspective. I will also dedicate some time to the challenges arising when releasing such a platform under an Open Source software-license. Authors and Affiliations – Adams, Till (1) Paulsen, Hinrich (2) terrestris GmbH & Co KG (1) mundialis GmbH & Co KG (2) Germany Track – Use cases & applications Topic – FOSS4G implementations in strategic application domains: land management, crisis/disaster response, smart cities, population mapping, climate change, ocean and marine monitoring, etc. Level – 2 - Basic. General basic knowledge is required. Language of the Presentation – English

uk: вхід без авторизації

name: HERMOSA: Supporting the UN decade on ecosystem restoration utilizing ..


Mark Craddock

type: Person

cs: Informatika

de: Informatik

fi: tietojenkäsittelytiede

uk: Комп'ютерні науки

en: Computer Science

fr: Informatique

da: Datalogi

es: Ciencias de la Computación

nl: Informatica

cs: Technické vědy

de: Ingenieurwissenschaften

fi: tekniikka

uk: Інженерія

en: Engineering Sciences

fr: Ingénierie

da: Ingeniørvidenskab

es: Ingeniería

nl: Engineering

description: The UN Global Platform was developed using open source and proprietary software to enable the production of economic indicators. Using GeoMesa, Kafka, GeoServer, Python and some analytics. An indicator of pending COVID doom was provided as an indicator the UK Treasury, Cabinet Office and Bank of England. This enabled savings of at least £12Bn for the UK economy. Post the 2008 financial crisis it was identified that AIS shipping location data was a good indicator of pending doom. The UN Global Platform developed a location analytics platform for analysing AIS and ADSB data in real-time. When the call came from the UK Government to ask what the impact of COVID-19 would have on the economy, the Platform use used to develop economic indicators of pending doom. Authors and Affiliations – Mark Craddock Co-Founder & CTO Global Certification and Training Ltd Previously, Director UN Global Platform Track – Use cases & applications Topic – Data collection, data sharing, data science, open data, big data, data exploitation platforms Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

TIB AV-Portal

type: Service

type: WebContent

type: MediaObject

@language: en

cs: přihlášení není vyžadováno

de: keine Anmeldung erforderlich

uk: вхід без авторизації

en: no login required

nl: geen login vereist

name: How Open Source saved the UK Economy £12Bn

type: Organization

cs: Video

de: Video

fi: Video

uk: Відео

en: Video

fr: Vidéo

da: Video

nl: Video

es: Video


uk: Комп'ютерні науки

description: How Open Source solution help to build an scalable and adaptable environmental decision platform tools ONF International, an institutional body in matters of international cooperation projects in the forest management areas need tools to help people to empower their decision. The Open-Source solution help us to find a set of tools to develop a web-based platform to interact with different stakeholder and help them on their decision about forest management. Especially we used and fund some component of QGIS, py-qgis-server, py-qgis-wps, R through a work with 3Liz using Lizmap. A successful work, funded by the Climate KIC was done on building a platform to help stakeholder on a forest restoration process on the Paragominas municipality in Brazil. ONF International is a private company working with private company as well as NGO or ministry at international level about forest management. These activities required to be able that all people involved in a forest management process can discuss together around a common denominator, a dedicated platform. Indeed, manage forest landscape required different kind of work such as to spatialize the space as well as display its own area such as the farm, regional park or municipality. It’s also often necessary to be able to generate statistic over specific information or being to be able to simulate and analyze scenario such as where are the best areas to do forest restoration in terms of biodiversity. Consequently, we need a set of tools allowing us to integrate all these requirements. Important parameter is that these set of tools must be scalable, quite easy to manage and be cost-efficient. So it quite naturally that we go through Open Source tools and more specifically Lizmap and its based component such as QGIS, py-qgis-server, py-qgis-wps, R. Through Lizmap, such tools allow us to design a platform, called Forland that contain the following component: * Webmapping including edition tools * Web processing * Web reporting Webmapping component allow us to visualize all geographic data given by the owner or produced by ourselves. In addition, this component is useful to allow user to interact with the data using edition tool. Web processing is especially powerful because based on exchange with the owner or more generally the different stakeholder it always to design a customized tool that user can use in the platform in order to help discussion and decision. Web reporting is a component allowing user to export map as well as statistic or graph as a summary of its use of the platform. At the end, web technologies used in Lizmap allow us to customize the interface using for example JavaScript to add feedback tools or add button to get access to a documentation component. In the context of a Climate KIC project and in collaboration with Lizmap for the development tools and XXXX for the design, we fund the development of these platform in the context of the forest restoration in Paragominas municipality in Brazil. All stakeholder was convinced by the adaptability of the platform to help to take decision. Different new project continues to enhance and develop our Forland platform where the structure is based on Open-Source tools Authors and Affiliations – Cédric Lardeux (1), Maxence Rageade (1), René-Luc D'Hont (2) (1) ONF International (2) 3Liz Track – Use cases & applications Topic – Data collection, data sharing, data science, open data, big data, data exploitation platforms Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

uk: вхід без авторизації

name: How Open Source solution help to build an scalable and adaptable environmental .....


uk: Комп'ютерні науки

description: In the past, few people would have described GRASS GIS as intuitive. Therefore, it was even more surprising when I got this response from beginner students! Come and listen to a presentation talking about the new generation of GRASS GUI. You will be surprised by the intuitive start, convenient data organization, GRASS in dark theme mode, and many other pleasant functions which me and the development team have prepared for you. Stay tuned! This talk will highlight the major improvements of the GRASS GUI in version 8 which is much more user-friendly to existing users as well as to completely new ones. Authors and Affiliations – Linda Kladivova (1) Vaclav Petras (2) Anna Petrasova (2) The GRASS GIS Development Team (3) (1) Faculty of Civil Engineering, Czech Technical University in Prague, Czech Republic (2) Center for Geospatial Analytics, North Carolina State University, USA (3) Global Track – Software Topic – Software status / state of the art Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

uk: вхід без авторизації

name: I hated the way GRASS started so I changed it


uk: Комп'ютерні науки

description: Iaso is a platform created to support geo-rich data collection efforts, mainly in public health in emerging countries. The key feature that it supports is that any survey is linked to an organizational unit that is part of a canonical hierarchy. Each one of these org. units can have a location and a territory. The mobile data collection tool can be used to enrich this hierarchy with additional GPS coordinates, names corrections, etc ... which can then be validated by officials of the organizations in question through the web dashboard (this is consequently similar in some aspects to OpenStreetMap, but with validation before integration in the reference dataset). This leads to continuous improvements of the geographic references available through the routine activities already planned (e.g. locating and registering health facilities while investigating malaria cases). The tool has been used in multiple data collection efforts, notably in health services in D.R. Congo, Niger, Cameroon, Mali and Nigeria and is more and more used to compare multiple versions of official organisational hierarchies when a canonical one needs to be rebuilt. We are for example working on such efforts to rebuild a school map for DRC with the NGO Cordaid. To help for this type of project, we provide location selection interfaces, multiple levels of audits and an API open to data scientists for analysis and mass edits. This presentation will demo the main features of the platform, and give some context about its creation. Iaso has been created by the company Bluesquare (https://bluesquarehub.com/, based in Belgium), specialised in software and services for public health, and has become open source under the MIT License in November 2020. It is still under heavy development, but is already the basis of at least a dozen projects. On the roadmap, we have features for a patient registry, monitoring tools for data collectors, and microplanning activities (producing routes for monitoring teams, or vaccination teams). Iaso is made of a white labeled Android application using Java/Kotlin and reusing large parts of the ODK projects and a web platform programmed using Python/GeoDjango on top of PostGIS. Frontend is mainly React/Leaflet. One of the aims is the ease of integration with other platforms. We already have csv and geopackage imports and exports and target easy integration with OSM. You can find the platform and its documentation here https://github.com/BLSQ/iaso The mobile application is available here https://play.google.com/store/apps/details?id=org.bluesquarehub.iaso.demo Authors and Affiliations – Martin De Wulf, Bluesquare. Track – Software Topic – FOSS4G for Sustainable Development Goals (SDG) Level – 2 - Basic. General basic knowledge is required. Language of the Presentation – English

uk: вхід без авторизації

name: Iaso: all-in-one platform for data collection and geographical registry


uk: Комп'ютерні науки

description: In 2021, Lizmap is 10 years old. Lizmap is an Open Source application to create web map applications, based on a QGIS project. It's composed of a QGIS plugin and a Web Client. Lizmap has been designed to take advantage of QGIS Server to facilitate the creation of Web maps. We will present the state of the project, the last changes using on a QGIS Server plugin and futur perspectives. At 3Liz, we are QGIS and PostGIS lovers. We are contributors of QGIS, mainly QGIS Server. We promote Open Source GIS solutions, mainly OSGeo, to our customers. In 2011, we decided to develop, as an Open Source Software, the Lizmap solution. The design of Lizmap aimed to publish Web Mapping applications with QGIS. The objective of Lizmap is to design and configure web mapping applications with QGIS desktop and only with it. No coding skills are needed. Lizmap takes full advantages of QGIS Server: symbology, labels, table relationships, print layouts, forms, etc. Lizmap consists of 2 tools: * Lizmap plugin allows to configure the options and tools of the web mapping application based on the QGIS project * Lizmap Web Client, running on a server with QGIS Server, delivers the user interface of the web mapping application from the QGIS project and the Lizmap configuration. Lizmap offers the possibility to publish simple web mapping applications for data consultation, but also to build advanced applications allowing map printing, data editing, search, dataviz, etc. Lizmap is also extensible. It is possible to add your own JavaScript and to use Lizmap modules (to add some extra features on top of Lizmap). Finally, Lizmap benefits from a growing community (localizations, documentation, JavaScripts, bug triaging, etc) and it is used all over the world (Indian ocean environment survey, Georice in South-East Asia, SAERI in South Atlantic, etc). Authors and Affiliations – René-Luc DHONT (3liz), Michaël DOUCHIN (3liz) Track – Software Topic – Software status / state of the art Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

uk: вхід без авторизації

name: Lizmap to create a Web Map Application with QGIS Desktop and Server


Maritime Big Data analysis with ARLAS

uk: Комп'ютерні науки

description: The maritime industry has become a major catalyst of globalisation. Political and economic actors meet various challenges regarding cargo shipping, fishing, and passenger transport. The Automatic Identification System (AIS) records and broadcasts the location of numerous vessels which supplies huge amounts of information that can be used to analyse fluxes and their behavior. However, the exploitation of these numerous messages requires tools adapted to Big Data. Acknowledgment of origin, destination, travel duration, and distance of each vessel can help transporters to manage their fleet and ports to analyse fluxes and track specific containers based on their previous locations. Thanks to the historical AIS messages provided by the Danish Maritime Authority and ARLAS PROC/ML, Gisaïa’s open-source and scalable processing platform based on Apache SPARK, we are able to apply our pipeline of processes and extract this information from the millions of AIS messages. We use a Hidden Markov Model (HMM) to identify when a vessel is still or moving and we create “courses”, embodying the travel of the vessel. Then we can derive the travel indicators. Authors and Affiliations – GAUTIER, Willi (1) Data science Department, Gisaïa, France, GAUDAN, Sylvain (2) Chief Technical Officer, Gisaïa, France FALQUIER, Sébastien (3), Data science Department, Gisaïa, France Track – Academic Topic – Academic Level – 2 - Basic. General basic knowledge is required. Language of the Presentation – English

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Climate change has immediate and observable impacts on Earth. The increase in natural catastrophes and our lack of community and global readiness is apparent. Commercial, affordable SAR constellations will result in the decentralization of Earth observation, improving natural catastrophe responsiveness, resilience, and broader community engagement. SAR sensors, with the ability to observe the Earth in ways entirely inaccessible by optical and infrared sensors, present a unique capacity to quantify catastrophic impact and plan for future improvement. But SAR imagery alone is not enough: the high resolution, coherence, and frequency of revisit are only as good as the tooling shared to facilitate insights and actions. Many tools are currently available, but can also be a challenge to scale with modern cloud resources as they are often developed by scientists for scientists or locked in classified government environments. What types of open source tools are required for sustainable solution development with SAR and how can we improve existing open source contributions as we exponentially collect imagery? How can we liberate knowledge often owned only by SAR experts? In this talk, we will discuss natural catastrophe solution development at ICEYE with high temporal and spatial resolution SAR and how we overcome the challenges through partnerships such as with ESA Phi-Lab and the ESA Third Party Mission (TPM) program. Authors and Affiliations – Strong, Shay ICEYE, Finland Track – Use cases & applications Topic – Data collection, data sharing, data science, open data, big data, data exploitation platforms Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

uk: вхід без авторизації

name: Natural Catastrophe Response Requires Friendly Tools & SAR Imagery


News from actinia

uk: Комп'ютерні науки

description: „Hello, my name is actinia. Some of you might know me already. I became an OSGeo Community Project in 2019 and my first appearance on a FOSS4G conference was in 2018 where I was presented in a talk. For those of you who do not know me yet - I have been developed to exploit GRASS GIS functionality via an HTTPS REST API with which GRASS locations, mapsets and spatio-temporal data are available as resources to allow their management and visualization. I was designed to follow the purpose of bringing algorithms to cloud geodata, the daily growing big geodata pools in mind. I can be installed in a cloud environment, helping to prepare, analyse and provide a large amount of geoinformation. But also for those who do know me already - do you know the details about what happened the last 2 years? A lot! Usage of interim results, helm chart, enhanced exporter, monitoring of mapset size, QA enhancements and a split of my plugins including module self-description of more than 500 modules are some key words to just name a few. With the ongoing development of the openeo-grassgis-driver, you can talk to me either in my native language or via openEO API. I would also like to tell you some interesting facts about me interacting in different projects. So come on over!“ „Hello, my name is actinia. Some of you might know me already. I became an OSGeo Community Project in 2019 and my first appearance on a FOSS4G conference was in 2018 where I was presented in a talk. For those of you who do not know me yet - I have been developed to exploit GRASS GIS functionality via an HTTPS REST API with which GRASS locations, mapsets and spatio-temporal data are available as resources to allow their management and visualization. I was designed to follow the purpose of bringing algorithms to cloud geodata, the daily growing big geodata pools in mind. I can be installed in a cloud environment, helping to prepare, analyse and provide a large amount of geoinformation. But also for those who do know me already - do you know the details about what happened the last 2 years? A lot! Usage of interim results, helm chart, enhanced exporter, monitoring of mapset size, QA enhancements and a split of my plugins including module self-description of more than 500 modules are some key words to just name a few. With the ongoing development of the openeo-grassgis-driver, you can talk to me either in my native language or via openEO API. I would also like to tell you some interesting facts about me interacting in different projects. So come on over!“ Authors and Affiliations – Tawalika, Carmen (1), Neteler, Markus (1), Weinmann, Anika (1), Riembauer, Guido (1) (1) mundialis GmbH & Co. KG, Bonn, Germany (https://www.mundialis.de/) Track – Software Topic – Software status / state of the art Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

uk: вхід без авторизації


One Geonode, many Geonodes

uk: Комп'ютерні науки

description: GeoSolutions has been involved in a number of projects, ranging from local administrations to global institutions, involving GeoNode deployments, customizations and enhancements. A gallery of projects and use cases will showcase the versatility and effectiveness of GeoNode, both as a standalone application and as a service component, for building secured geodata catalogs and web mapping services. GeoNode is a Web Spatial Content Management System based entirely on Open Source tools whose purpose is to promote the sharing of data and their management in a simple environment where even non-expert users of GIS technologies can view, edit, manage, and share spatial data, maps, prints, and documents attached. GeoNode was initiated in 2009 by the World Bank and OpenGeo but from 2011 is entirely run by the developer community that the project has been able to attract. It claims some large organizations among its contributors such as the United Nations, the World Bank and the European Commission as well as many NGOs and private companies. GeoNode is based on a set of robust and widespread open source components as Django as a basic framework, GeoServer for geospatial data management and OGC services and MapStore as mapping application. It can also communicate with PostgreSQL for vector data management. GeoSolutions has been involved in a number of projects, ranging from local administrations to global institutions, involving GeoNode deployments, customizations and enhancements. A gallery of projects and use cases will showcase the versatility and effectiveness of GeoNode, both as a standalone application and as a service component, for building secured geodata catalogs and web mapping services. Lastly, ongoing and future developments will be presented ranging from the upcoming integration with MapStore to the monitoring and analytics dashboard or the support for time series data. Authors and Affiliations – giovanni.allegri@geo-solutions.it alessio.fabiani@geo-solutions.it Track – Use cases & applications Topic – Software/Project development Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

uk: вхід без авторизації


uk: Комп'ютерні науки

description: At the beginning of this century, the very existence of geo-services based on an uniform API like WMS aroused admiration. Today, having more than 10 years of INSPIRE behind us, this question often no longer arises. With software-projects like UMN MapServer, GeoServer, deegree or QGIS Server – to name just a few – there are notable solutions that can be used to transform geodata into standardized services. Once your data is published as WMS (or WFS, e.g.), one can rely on many additional tools, functions and interfaces. Thus a non-experienced user is confronted with many tools but also with the question on which tools can be used to achieve an optimal result for his or her personal task. The talk presents one Open Source toolset for the set-up of geodata-services that consists of GeoServer/GeoWebCache, GeoStyler and MapProxy. In my talk I will present one rock-solid possible solution for the setting-up of high-performance geodata-services. The presented solution has proved its usability and is the base for the world wide open and widely used OpenStreetMap basemap-service „ows.terrestris.de“. The talk focusses on the OSGeo project GeoServer but will also present the OSGeo Community Projects GeoStyler and MapProxy. The solution is vividly presented by means of a few examples and the talk is peppered with some hints on styling, performance tuning and caching of services. Authors and Affiliations – Adams, Till Jansen, Marc terrestris GmbH & Co KG Germany Track – Use cases & applications Topic – Data visualization: spatial analysis, manipulation and visualization Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

uk: вхід без авторизації

name: Optimized publishing of map and dataservices with GeoServer, GeoStyler and MapProxy


OSGeoLive project report

uk: Комп'ютерні науки

description: OSGeoLive is a self-contained bootable DVD, USB thumb drive or Virtual Machine based on Lubuntu, that allows you to try a wide variety of open source geospatial software without installing anything. It is composed entirely of free software, allowing it to be freely distributed, duplicated and passed around. It provides pre-configured applications for a range of geospatial use cases, including storage, publishing, viewing, analysis and manipulation of data. It also contains sample datasets and documentation. OSGeoLive is an OSGeo project used in several workshops at FOSS4Gs around the world. https://live.osgeo.org The OSGeoLive project has consistently and sustainably been attracting contributions from ~ 50 projects for over a decade. Why has it been successful? What has attracted hundreds of diverse people to contribute to this project? How are technology changes affecting OSGeoLive, and by extension, the greater OSGeo ecosystem? Where is OSGeoLive heading and what are the challenges and opportunities for the future? How is the project steering committee operating? In this presentation we will cover current roadmap, opportunities and challenges, and why people are using OSGeoLive. https://live.osgeo.org Authors and Affiliations – Tzotsos, Angelos (1) Emde, Astrid (1) (1) Open Source Geospatial Foundation Track – Software Topic – Software status / state of the art Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

uk: вхід без авторизації


uk: Комп'ютерні науки

description: During this presentation, the participants will discover the new version control system and advanced editing tools that have been developed for gvSIG Desktop. With the new version control system, users will be able to edit vector layers and recover the situation of the geometries in a concrete time, very useful for some projects such as the vertical and horizontal sign management on a road or in a municipality. In addition, several advanced editing tools have been included in gvSIG, in order to increase the potential of vector editing. The version control system is a new powerful tool that has been developed for gvSIG Desktop. It is based on the centralization of information to be shared between users, and unlike a normal server, it remembers the changes that have been made to their data. It should be noted that it doesn't store only information, but also the information as well as the modifications users make on it. Apart from the version control system, the last version of gvSIG Desktop includes not only new functionalities for advanced editing but also improvements in the existing tools that have increased the potential of the application. The most outstanding novelty is the new expression manager that has been applied to the filter tool, the field calculator or the editing tools, allowing the selection of elements or the fill in of registers on the table based on geoprocessing tools. Authors and Affiliations – Mario Carrera. gvSIG Association Matéo Boudon. gvSIG Association Track – Software Topic – Software status / state of the art Level – 2 - Basic. General basic knowledge is required.

uk: вхід без авторизації

name: Professional multi-user editing with gvSIG Desktop


uk: Комп'ютерні науки

description: This is the story of how one QGIS plugin came to be and the lessons we learned along the way. The Literature Mapper QGIS Plugin was created to fill a need: academic journal articles are often about a specific location (this is common in fields such as ecology, archaeology, and history), but there was no method for connecting location data to a citation manager. We built the tool we needed from the idea stage (a paper map hand annotated in pencil), to prototype, to freely available code in the QGIS Plugin repository, to a tool that is steadily gaining users. In this talk, we will describe our experience developing the Literature Mapper QGIS plugin – all the ups and downs – to explain the process and encourage more people to try making their own plugin. Michele Tobias and Alex Mandel both hold PhDs in Geography and have worked in the geospatial field for 20 years, mainly working with open source tools. Both are active members of OSGeo. This goal of this talk is not only to give people practical skills and advice, but also to offer encouragement to folks who just need a little boost to try something new. Authors and Affiliations – Tobias, Michele (1) Mandel, Alex (2) (1) University of California, Davis - UC Davis DataLab (2) Development Seed Requirements for the Attendees – Documentation: http://micheletobias.github.io/maps/LiteratureMapper.html Repository: https://github.com/MicheleTobias/LiteratureMapper Academic Publication: https://journals.sagepub.com/doi/full/10.1177/11786221211009209 Track – Software Topic – Data collection, data sharing, data science, open data, big data, data exploitation platforms Level – 2 - Basic. General basic knowledge is required.

uk: вхід без авторизації

name: QGIS Plugin Development Is Not Scary: Lessons Learned from Literature Mapper


Serious tech for non-serious maps

uk: Комп'ютерні науки

description: Open Fantasy Map uses the technology stack of Open History Map to store data about fantasy worlds for role players to live their adventures in the best ways possible. The platform displays fantasy maps created via generative algorythms as well as digitized maps by artists. This also enables, thanks to the OHM technologies, to "fork" the world and have the players impacting and changing their world. Open Fantasy Map uses the technology of Open History Map to store data about fantasy worlds for role players to live their adventures in the best ways possible. The platform displays fantasy maps created in several waysa: On one hand it uses generative algorythms to create continents, countries, cities, streets, biomes, and many other elements for the players to interact with and to manage. On the other hand, it uses the tools created for Open History Map to digitize ancient maps to help artists digitize their own modern productions in order to make these maps interactively available to the players. The OHM technology stack enables also th eforking of the world into several different situations where the players can impact their own sections of the world. We want to share the experience in creating both the genrative algorythms as well as the platform. Authors and Affiliations – Montanari, Marco (1) Gigli, Lorenzo (2) , Taddia, Luca (3) (1) Open History Map (2) University of Bologna (3) Just Play Bologna Track – Use cases & applications Topic – Data collection, data sharing, data science, open data, big data, data exploitation platforms Level – 3 - Medium. Advanced knowledge is recommended. Language of the Presentation – English

uk: вхід без авторизації


FOSS4G 2021 - State of GeoMesa

uk: Комп'ютерні науки

description: LocationTech GeoMesa is a suite of tools for working with big geo-spatial data by leveraging big data technologies like Apache projects like HBase, Kafka, NiFi, and Spark to enable persistence, streaming, ETL, and analysis. In this talk, we will give background information about the core capabilities of GeoMesa and additionally discuss recent improvements in GeoMesa 3.x over the last year. These changes include support for newer versions of Scala (enabling Spark 3.x support), Kafka, and HBase/Accumulo. Other improvements include new features which help improve use of GeoMesa components in Docker and Kubernetes. LocationTech GeoMesa is a suite of tools for working with big geo-spatial data by leveraging big data technologies like Apache projects like HBase, Kafka, NiFi, and Spark to enable persistence, streaming, ETL, and analysis. In this talk, we will give background information about the core capabilities of GeoMesa and additionally discuss recent improvements in GeoMesa 3.x over the last year. These changes include support for newer versions of Scala (enabling Spark 3.x support), Kafka, and HBase/Accumulo. Other improvements include new features which help improve use of GeoMesa components in Docker and Kubernetes. Authors and Affiliations – James Hughes Track – Software Topic – Software status / state of the art Level – 3 - Medium. Advanced knowledge is recommended.

uk: вхід без авторизації


State of GeoServer

uk: Комп'ютерні науки

description: This presentation provides an update on our community as well as reviews of the new and noteworthy features for the latest releases. Attend this talk for a cheerful update on what is happening with this popular OSGeo project, whether you are an expert user, a developer, or simply curious what GeoServer can do for you. GeoServer is a web service for publishing your geospatial data using industry standards for vector, raster and mapping. It powers a number of open source projects like GeoNode and geOrchestra and it is widely used throughout the world by organizations to manage and disseminate data at scale. This presentation provides an update on our community as well as reviews of the new and noteworthy features for the latest releases. This year in particular we have a lot to cover for 2.18 and 2.19 releases, as well as a preview of the September 2.20 release. Attend this talk for a cheerful update on what is happening with this popular OSGeo project, whether you are an expert user, a developer, or simply curious what GeoServer can do for you. Authors and Affiliations – Andrea Aime (1) Jody Garnett (2) (1) https://www.geosolutionsgroup.com/ (2) https://www.geocat.net/ Track – Software Topic – Software status / state of the art Level – 2 - Basic. General basic knowledge is required.

uk: вхід без авторизації


State of MapServer 2021

uk: Комп'ютерні науки

description: MapServer is an OSGeo project for publishing spatial data and interactive mapping applications to the web [1]. 2021 will see the 8.0 release of MapServer [2]. An overview of the performance boosts, security updates, code quality improvements, and new features such as an initial OGC API implementation, and PROJ 6+ support. An update will be given on the MapServer ecosystem - including new sites from the MapServer gallery, related projects such as MapCache [3], and the various distribution channels. Finally we'll look at how to become a part of the MapServer community and help with the continued success of the project. [1] https://mapserver.org/ [2] https://github.com/mapserver/mapserver/wiki/MapServer-8.0-Release-Plan [3] https://mapserver.org/mapcache/ The MapServer PSC will be working towards providing the MapServer user base with an annual update on project news and developments. Content covered in Abstract above. Authors and Affiliations – Girvin, Seth (1) MapServer PSC (2) Track – Software Topic – Software status / state of the art Level – 1 - Principiants. No required specific knowledge is needed.

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description: Supporting forest climate adaptation planning with point cloud analytics for nontraditional geospatial users In fire adapted forests, three dimensional structural characteristics are critical factors in drought and fire resilience. Public point cloud repositories such as the USGS 3DEP program, Opentopography.org, and in the future the Earth Archive, are critical data infrastructure for climate adaptation planning. As we collectively face escalating climate hazards, the value in deploying operational geospatial tools for managing risk grows. Historical forest management in the Western United States has resulted in declining resilience. To stabilize above ground carbon pools and secure critical ecosystem services, the State of California and the US Forest Service have committed to treating 400,000 hectares of forest per year through 2030. These typically involve strategic mechanical thinning coupled with application of beneficial low to moderate intensity fire. These programs are often planned and implemented through shared stewardship agreements between government agencies and implementation partners from nongovernmental organizations, First Nations governments, and local jurisdictions. Large government land managers and industrial forest operators have typically used commercial enterprise geospatial software for data driven decision support. Software licensing restrictions create arbitrary barriers between partners. The proliferation of nontraditional climate planners and the need for long term reproducible data science products have created an important opportunity for the FOSS4G community. The California Forest Lidar Collaborative has been providing technical support and training to a diverse user community to apply point cloud analytics to a broad range of forestry problems. This program has facilitated the adoption of data science pipelines using Python, R, PDAL, GDAL, GRASS, and QGIS. This results in transparent environmental compliance processes, democratization of climate adaptation planning, reproducible forest data science workflows and increased diffusion of best-in-class geospatial tools. In fire adapted forests, three dimensional structural characteristics are critical factors in drought and fire resilience. Public point cloud repositories such as the USGS 3DEP program, Opentopography.org, and in the future the Earth Archive, are critical data infrastructure for climate adaptation planning. As we collectively face escalating climate hazards, the value in deploying operational geospatial tools for managing risk grows. Historical forest management in the Western United States has resulted in declining resilience. To stabilize above ground carbon pools and secure critical ecosystem services, the State of California and the US Forest Service have committed to treating 400,000 hectares of forest per year through 2030. These typically involve strategic mechanical thinning coupled with application of beneficial low to moderate intensity fire. These programs are often planned and implemented through shared stewardship agreements between government agencies and implementation partners from nongovernmental organizations, First Nations governments, and local jurisdictions. Large government land managers and industrial forest operators have typically used commercial enterprise geospatial software for data driven decision support. Software licensing restrictions create arbitrary barriers between partners. The proliferation of nontraditional climate planners and the need for long term reproducible data science products have created an important opportunity for the FOSS4G community. The California Forest Lidar Collaborative has been providing technical support and training to a diverse user community to apply point cloud analytics to a broad range of forestry problems. This program has facilitated the adoption of data science pipelines using Python, R, PDAL, GDAL, GRASS, and QGIS. This results in transparent environmental compliance processes, democratization of climate adaptation planning, reproducible forest data science workflows and increased diffusion of best-in-class geospatial tools. Authors and Affiliations – Tim Bailey Watershed Research and Training Center Track – Use cases & applications Topic – FOSS4G for Sustainable Development Goals (SDG) Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

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name: Supporting forest climate adaptation planning with point cloud analytics ...


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description: This talk focuses on aspects of transitioning Open Source software projects into productive environments. The Deutsche Telekom AG has set out to use FOSS software to build a comprehensive geospatial data management and processing environment based on cloud technology. Some components (like PostGIS and QGIS) are used as COTS (commercial off the shelf) products. Others (like GRASS GIS) are used as libraries to implement intricate parts of an incredibly specific process to dig optimized trenches for fiber optics cables throughout Germany. The project uses agile methods to implement this architecture with FOSS products and projects and hand crafted implementations to achieve it's objectives. If we use the analogy of a bridge across a deep valley to achieve the objectives, then it feels like going full speed on a downhill bike, jumping into thin air and reaching the other side of the valley in a truck carrying internet access for millions landing on a concrete bridge that has manifested halfway through. A bit frightening, but so cool! That's FOSS! Before going into implementation details we have to clarify some terminology: In the physical world, a project is planned for a specified time with a specified budget and clearly defined objectives. Think: building a bridge. It will be unique because it spans across a specific valley and has to account for a specific geology and specific use (people, donkeys, cars, trucks, trains or electrons). Building the bridge will require a plan, excavators, trucks, steel, concrete, asphalt, cables and so on. When the project is "done" people, goods and electrons can cross the bridge: Even donkeys can use it. Another example for the same terminology in a different context is the process of making a new car. This will start with a project focused on achieving the objective of making a new car. Once the car has become a reality, the project ends. The product itself gets reproduced (and sold) as often as possible to allow people to drive across the bridge which was the end product of another project. In the FOSS realm things are a Megabit different. A FOSS software project is an ongoing effort to create software, typically by a diverse and sustainable developer community. Some projects have been around for decades (think GRASS GIS). They are never "done". Others stick around for a few years while they are needed and then either get outdated or replaced by a contender (see Community MapBuilder a good decade ago). In general, when it gets started, there is no predefined end to a software project. Sometimes the founder of a software don't even know that they are founding a software (think Gary Sherman writing the first lines of what today is better known as QGIS). Sometimes Open Source software projects become part of a product. This typically happens in a downstream effort by a completely different set of actors (think Google's Kubernetes turning into the core of RedHat's Openshift). When it comes to combining all of these realms within a project aiming at achieving an objective by using FOSS software projects – things can really become a bit confusing. Hopefully we are going to be able to clarify a few things as we go through our presentation(s). Authors and Affiliations – Arnulf Christl, Metaspatial Senior Consultant, terrestris GmbH & Co. Kg., Germany Track – Use cases & applications Topic – Business powered by FOSS4G Level – 2 - Basic. General basic knowledge is required. Language of the Presentation – English

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name: The Borked Supply Chain. How the Telekom brings FOSS Projects into Stable Production


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description: GeoExt is a JavaScript library combining the OpenLayers mapping library and the JavaScript framework ExtJS. It became an OSGeo community project in 2019. The talk will give a brief history of the project, and a summary of its dependencies and versions. Several new features recently developed for the latest GeoExt release will be presented. The talk will include an overview of two additional Open Source JavaScript libraries which bring even more power and functionality to GeoExt: BasiGX and GeoStyler. BasiGX is a higher-level JavaScript library that builds on top of GeoExt and focusses on advanced GIS user interfaces and mapping tools for the web. GeoStyler – in itself an OSGeo community project – is a JavaScript library for cartographic styling of geodata, and can be combined with a GeoExt solution to apply several formats to layers, e.g. SLD (Styled Layer Descriptor) files. The talk will include examples of real-world projects using GeoExt, along with recommendations on what types of projects are most suitable to be developed using GeoExt and its associated technologies. We'll discuss how and when newer OpenLayers and ExtJS versions will be supported, and how to combine GeoExt with other JavaScript packages. Finally a roadmap for the future of GeoExt will be outlined along with how developers and users can get involved. GeoExt is a JavaScript library combining the OpenLayers mapping library and the JavaScript framework ExtJS. It became an OSGeo community project in 2019. The talk will give a brief history of the project, and a summary of its dependencies and versions. Several new features recently developed for the latest GeoExt release will be presented. The talk will include an overview of two additional Open Source JavaScript libraries which bring even more power and functionality to GeoExt: BasiGX and GeoStyler. BasiGX is a higher-level JavaScript library that builds on top of GeoExt and focusses on advanced GIS user interfaces and mapping tools for the web. GeoStyler – in itself an OSGeo community project – is a JavaScript library for cartographic styling of geodata, and can be combined with a GeoExt solution to apply several formats to layers, e.g. SLD (Styled Layer Descriptor) files. The talk will include examples of real-world projects using GeoExt, along with recommendations on what types of projects are most suitable to be developed using GeoExt and its associated technologies. We'll discuss how and when newer OpenLayers and ExtJS versions will be supported, and how to combine GeoExt with other JavaScript packages. Finally a roadmap for the future of GeoExt will be outlined along with how developers and users can get involved. Authors and Affiliations – Marc Jansen, terrestris Seth Girvin, Compass Informatics Christian Mayer, meggsimum Track – Software Topic – Software status / state of the art Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

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name: The state of GeoExt along with an outlook on its future


The Very Best New Features of QGIS 3.x

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description: This presentation will give a visual overview of the major new improvements of QGIS 3.x over the last calendar year QGIS releases three new versions per year. With each there is a long list of new features. This presentation will give a visual overview of some of the best new features released over the last calendar year. Examples or short demonstrations will be included. Potential topics include: User interface * Symbology - renderers and labeling * the Temporal controller * Print composer * Improvements in the expression engine * Digitizing * New processing algorithms * Graphical modeler * QGIS 3D * Data providers and support for Mesh data and Point clouds. Come and learn about how far QGIS has evolved in the last year! Authors and Affiliations – Kurt Menke - Septima P/S, Copenhagen, Denmark Requirements for the Attendees – This talk will be of interest to many from casual users of QGIS to seasoned professionals. Track – Software Topic – Software status / state of the art Level – 2 - Basic. General basic knowledge is required. Language of the Presentation – English

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description: The hurdles we encountered when transitioning a project from a single GeoServer instance to an autoscaling MapProxy system while trying to mimic existing functionality. The hurdles we encountered when transitioning a project from a single GeoServer instance to an autoscaling MapProxy system while trying to mimic existing functionality. Authors and Affiliations – James Banting, Sparkgeo Tom Christian, Sparkgeo Track – Use cases & applications Topic – Software/Project development Level – 2 - Basic. General basic knowledge is required. Language of the Presentation – English

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name: There and Back Again: Lessons learned in transitioning from GeoServer to MapProxy


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description: The UN Open GIS Initiative is intending to provide a sustainable hybrid GIS platform (integrating open-source software GIS technology with the existing proprietary GIS platform) to effectively and efficiently support enhanced Situational Awareness and informed decision making to fulfill the core mandates of UN operations (e.g. Monitors ceasefire agreement & armed groups activities, Sustainable development, disaster risk reduction, etc.). During emergency operations, GIS and Image Intelligence significantly contribute to lifesaving operations, whether search and rescue or any other emergency operations. Having this ability, GIS has proven to minimize the cost of operations, assist in lifesaving activities, provide a common understanding of the situation through visual information of the areas of interest. UN has been utilizing geospatial technology over the past few decades and its GIS infrastructure has been built on mostly proprietary solutions. For the past years, hybrid and open-source technology have grown and matured beyond what just proprietary solutions can provide. Continuing provision of GIS services only on proprietary solution brings considerable challenges, such as limited flexibility, restrictions in data formats, high cost of licenses, limited options for scalability and mainstream, and difficulty to transfer capacity & technology to the Member States (host nations) and working partners. Where hybrid and open-source complement to effectively support UN operational and technical demands, it is complementing UN legacy GIS infrastructure, it minimizes the cost of licenses, which would optimize the cost of running and maintaining of GIS infrastructure. The hybrid and open source technology provides flexibility and streamlining of GIS process, scalability due to cost efficiency, interoperability, innovations, and has a lighter footprint on the infrastructure. Hybrid GIS architecture combines the necessary components and technical demand from both proprietary and open-source solutions through the integration of a geospatial database between a proprietary and open-source that complements both platforms to support every UN requirement. The Hybrid GIS Infrastructure pilot project focused on proofing the concept through the design and implementation of a hybrid prototype to support (1) Unite Map and (2) Open GeoPortal. This talk will share the experience of integration of proprietary and open-source GIS Infrastructure. Background: the UN Open GIS Initiative, established in 2016, is an ongoing partnership initiative and supported by the UN Member States, International Organizations including UN Agencies, Academia, NGOs, and the Private Sector. UN Open GIS aims to create an extended spatial data infrastructure by utilizing open source GIS solutions that meet the United Nations' operational requirements (UN Secretariat including UN field missions and Regional commissions) and then expands to UN agencies, UN operating partners, and developing countries. Authors and Affiliations – Timur Obukhov (1) Gakumin Kato (1) Diego Gonzalez Ferreiro (2) Zeeshan Khan (2) Luis E. Bermudez (3) HaeKyong Kang (4) (1) Geospatial Information Section, Office of Information and Communications Technology, United Nations (2) Client Solutions Delivery Section, Service for Geospatial, Information and Telecommunications Technologies, United Nations Global Service Centre (3) GeoSolutions USA (4) Korea Research Institute for Human Settlements (KRIHS) Track – Use cases & applications Topic – Software/Project development Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

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name: FOSS4G 2021 - UN Open GIS Initiative: Implementation of Hybrid GIS Infrastructure


When Geometry meets Geography

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description: Geometry is clean, easy and polished. Geography is messy, dirty and unfitting. When we -geospatial developers and technicians- built applications to solve real life issues usually rely on the first. But eventually, we have to deal with the second. This talk is a very short sneak peak of a book I am writing to explain the most interesting cases I have experienced when working in the industry. Can a buffer tell me if I can take a walk to the nearest park? How a disputed territory such as Nagorno-Karabakh is displayed in a webmap? How geocoders understand the wide diversity of national postal systems? Geometry is clean, easy and polished. Geography is messy, dirty and unfitting. When we -geospatial developers and technicians- built applications to solve real life issues usually rely on the first. But eventually, we have to deal with the second. This talk is a very short sneak peak of a book I am writing to explain the most interesting cases I have experienced when working in the industry. Authors and Affiliations – Ramiro Aznar Geospatial Data Engineer at Planet Track – Transition to FOSS4G Topic – Data visualization: spatial analysis, manipulation and visualization Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

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description: The session highlights the different aspects related to equality and diversity in FOSS4G. In the past years, women+ groups, including Women in Geospatial+, have amassed members from all over the globe, as well as from all backgrounds in the geospatial field. Through our work, we noticed increased interest in participation in the geospatial field, necessity for mentorship and being mentored, proactivity and a keen desire to learn and have access to skills and opportunities that were not being easily available to women so far. Through our work and the work of other sister organisations (e.g Geochicas, African Women in GIS, Ladies of Landsat, Sisters of SAR, GeoLatinas), we could determine that while the trend for equality and diversity in the field is a positive one, albeit slow, there is an imbalanced involvement in open source component of the geospatial field, with less women+ representatives overall. The main goal of this event will be to showcase the opportunities of a career path in FOSS4G and the role of leadership in the FOSS4G space by hearing the stories of a slate of leaders. How these leaders got involved in FOSS4G and what attracted them to this side of the geospatial field? What does leadership mean within FOSS4G? What are some of the opportunities and challenges that these leaders face today? How do leaders in this space see the future of the community? What opportunities are there for individuals that seek to get more involved in FOSS4G? These questions will be addressed first in a panel discussion, followed by an opportunity to connect with fellow geospatial women+ in a social event. The panel will also focus on the broadening diversity of technical leaders within the FOSS4G, GIS, and other STEM communities and how these shifts have been reframing these technical spaces and their impact. The social event will give the participants the occasion to meet, socialise and share individual experiences in an interactive manner. Authors and Affiliations – Kate Vavra-Musser Cristina Vrinceanu Laura Mugeha Rohini Swaminathan Track – Community / OSGeo Topic – Community & participatory FOSS4G Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

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name: FOSS4G 2021 - Women In Geospatial+: Career stories of women in FOSS4G


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description: Bayer Crop Science has engaged in a multi-year collaboration with Sparkgeo Consulting to deliver an evolving set of spatial imagery search, discovery, and visualization capabilities built on top of open source geospatial software. Initial solutions integrated CKAN, Geoserver, and Geotrellis to pre-render custom tilesets for derived analytic outputs. This process proved difficult to scale with increasing ingest rates and led to standardizing imagery pipeline outputs on Cloud Optimized GeoTIFFs(COGs) with rio-tiler, pyproj, GDAL , Shapely, and Rasterio for processing to define dynamic rendering visualization products in a newly developed STAC-compliant catalog. The Sparkgeo team has written a custom Global Imagery Search tool for our corporate OpenLayers-enabled application framework which combines event-based per-scene visualization processing with STAC search results and TMS-to-COG range/column searches. The Global Imagery Search tool also allows client/application side dynamic color map rendering. This presentation will describe the evolution from tilesets to dynamic rendered tiles and the customizations within STAC-collections needed to achieve this. This presentation will describe the implementation challenges of scaling inputs and processing pre-rendered tilesets for application visualization and how the decision to re-direct to a COGs + STAC cloud implementation has met our scaling objectives. Authors and Affiliations – Martin Mendez-Costabel – Bayer Crop Science Paul Trudt – Bayer Crop Science Will Cadell – SparkGeo Consulting Dustin Sampson – Sparkgeo Consulting Joe Burkinshaw – Sparkgeo Consulting Angelo Arboleda – Sparkgeo Consulting Track – Use cases & applications Topic – Business powered by FOSS4G Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

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name: Evolving Imagery Visualization with Open Source Development


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description: The participants of this year's Google Summer of Code on OSGeo projects and winners of United Nations-OSGeo Education Challenge 2021 will present their work and their experiences contributing to OSGeo projects. This year, 12 students were assigned an OSGeo project to contribute to this Summer. Browse the projects at https://summerofcode.withgoogle.com/organizations/5336634351943680/ 2 Winners were selected for the United Nations-OSGeo Education Challenge 2021. Browse more details: https://www.osgeo.org/foundation-news/2021-osgeo-un-committee-educational-challenge/ Authors and Affiliations – Shinde, Rajat (1) Chauhan, Rahul (1) (1) Coordinator of OSGeo in the GSoC (OSGeo GSoC Organization Administration Team) Speakers: Francesco Bursi - francesco.bursi@hotmail.it Linda Kladivova - lindakladivova@gmail.com, L.Kladivova@seznam.cz Caitlin Haedrich - caitlin.haedrich@gmail.com Aaron Saw Min Sern - aaronsms@u.nus.edu Aniket Giri - aniketgiri770@gmail.com Aryan Kenchappagol - aryan.kenchappagol@gmail.com Sandeep Saurav - sandeep.saurav97@gmail.com Sourav Singh - srvsingh1962@gmail.com Ayoub Fatihi - ayoubfatihi1999@gmail.com Ashish Kumar - ashishkr23438@gmail.com Veenit Kumar - 123sveenit@gmail.com Han WANG - hanwgeek@gmail.com OSGeo-UN 2021 Challenge Winners Patrick Happ - patrick@ele.puc-rio.br Swapnil Joshi - swapniljoshi@iitb.ac.in Track – Community / OSGeo Topic – Software/Project development Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

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name: Google Summer of Code and UN-OSGeo Education Challenge 2021 Presentation


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description: Terristory is a web platform providing a sustainable energy observatory oriented towards decision-makers and territory planners. AURA-Energie Environnement is a French association acting on account of the Auvergne-Rhône-Alpes region to promote sustainable energy. Aura-EE started the Terristory project a couple of years ago, in order to put their data on the web. Energy data is geographic by nature, and one of the main aspect of managing energy is being able to observe its characteristics on a given territory. From a simple data viewer, Terristory evolved into a full platform for data observation. Dynamic graphs have been added, and some advanced features like : - create scenarii on Energy equipment ( e.g. build a methanizer ) - impact of decisions on local employment Terristory is based on OpenSource software : PostGIS, Python, OpenLayers, Vector tiles… The full code for the Terristory platform itself is opensource and will be published publicly in 2021. Terristory was initially funded by a single actor and deployed in a single region. In 2020, the project accelerated : it evolved into a consortium to support the platform and deploy it in other regions. This evolution made Terristory a national project, and a reference platform for energy data visualization. This mutation is interesting on multiple levels, as it is totally coherent with an opensource project : - from a simple project to a full platform - from a single developer from a single company to multiple developers from various origins - from a single funder to multiple funders organized as a consortium - from a single actor for roadmap definition to a mutualized roadmap This transformation makes the project's history and experience unique. The battle for climate is open, and platforms such as Terristory have a strong role to play. It should be an inspiration for any project oriented towards opensource, opendata and resource mutualization. Terristory is a web platform providing a sustainable energy observatory oriented towards decision-makers and territory planners. AURA-Energie Environnement is a French association acting on account of the Auvergne-Rhône-Alpes region to promote sustainable energy. Aura-EE started the Terristory project a couple of years ago, in order to put their data on the web. Energy data is geographic by nature, and one of the main aspect of managing energy is being able to observe its characteristics on a given territory. From a simple data viewer, Terristory evolved into a full platform for data observation. Dynamic graphs have been added, and some advanced features like : - create scenarii on Energy equipment ( e.g. build a methanizer ) - impact of decisions on local employment Terristory is based on OpenSource software : PostGIS, Python, OpenLayers, Vector tiles… The full code for the Terristory platform itself is opensource and will be published publicly in 2021. Terristory was initially funded by a single actor and deployed in a single region. In 2020, the project accelerated : it evolved into a consortium to support the platform and deploy it in other regions. This evolution made Terristory a national project, and a reference platform for energy data visualization. This mutation is interesting on multiple levels, as it is totally coherent with an opensource project : - from a simple project to a full platform - from a single developer from a single company to multiple developers from various origins - from a single funder to multiple funders organized as a consortium - from a single actor for roadmap definition to a mutualized roadmap This transformation makes the project's history and experience unique. The battle for climate is open, and platforms such as Terristory have a strong role to play. It should be an inspiration for any project oriented towards opensource, opendata and resource mutualization. Authors and Affiliations – Sylvain Beorchia, Oslandia Vincent Picavet, Oslandia Pierrick Yalamas, AURA-EE Track – Use cases & applications Topic – Data collection, data sharing, data science, open data, big data, data exploitation platforms Level – 2 - Basic. General basic knowledge is required. Language of the Presentation – English

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name: Terristory : a sustainable energy observatory becoming a mutualized nation-wide platform


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description: The EcoValuator plugin provides a simple means of estimating the dollar value of recreation, water supply, food, and other key ecosystem services for a given study area. Once installed in QGIS, the tool combines satellite land use/land cover data with your own spatial data describing watersheds, conservation areas, or other areas of interest. The EcoValuator then does the work of estimating land area in each land cover type present in your region using the Benefits Transfer Method (BTM) to generate dollar value estimates of the value of the ecosystem services supported by the land use/land cover present in your region. Ecosystem services are the many benefits to humans provided by the natural environment and healthy ecosystems. This definition emphasizes that ecosystem services are the effects the environment has on people, but it is not just what those effects are that matters. It is also where the effects occur. The “where” is especially what drove us to create the EcoValuator tool in order to better understand ecosystem service effects in our area of interest. The EcoValuator tool is a QGIS plugin which uses publicly available land use/land cover data to predict the value of the user’s study area. Currently, the plugin supports datasets from the North American Land Change Monitoring System (NALCMS), which covers Canada, Mexico, and the United States, or the National Land Cover Dataset (NLCD) for the US only. EcoValuator does this using the Benefits Transfer Method (BTM) to generate dollar-value estimates of the ecosystems supported by the land use/land cover present in your study area. BTM provides an accessible way of estimating the value of ecosystem service flows in your study area based on the values estimated in another, similar, setting, called the “source” area. BTM is a practical policy analysis tool when time and resource constraints prevent more involved methods. In the EcoValuator, we employ a version of “unit value transfer” and apply estimates from source studies to the user-defined study area based on matching land cover in both areas. We began with an initial list of more than 1,200 specific estimates of the monetary value of specific ecosystem services arising from specific land cover types and have classified the source studies according to each ecosystem service and have adjusted the monetary values for inflation. The EcoValuator is a pair of algorithms the user runs in sequence. In Step 1, the input land cover data is clipped to the user-input study area. The amount of each land cover type is calculated and multiplies those areas by the associated ecosystem service value in our input table of research data. Step 2 creates a new raster for which the value is represented per-pixel of the user-selected ecosystem service. Step 3 is optional and creates a nice looking final output in .pdf format. Though this project currently focuses on North American ecosystems, we plan to expand the use to accommodate land use/land cover data from other regions in the world, principally southeast Asia. Authors and Affiliations – Erich Purpur - University of Virginia. Charlottesville, Virginia, United States Track – Use cases & applications Topic – FOSS4G implementations in strategic application domains: land management, crisis/disaster response, smart cities, population mapping, climate change, ocean and marine monitoring, etc. Level – 2 - Basic. General basic knowledge is required. Language of the Presentation – English

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name: EcoValuator: Basic Ecosystem Service Valuation for Custom Landscapes


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description: With the development of 3D applications related to geography, the standards and specifications for the provision of corresponding data are increasingly coming into focus. The presentation deals with the current development status of the CesiumJS library as well as the standards and possible uses of individual features and shows some examples from a recent project, in which we presented underground 3D geodata. Thus, this contribution can be seen as a renewal of our 2013 FOSS4G contribution entitled "Modelling 3D Underground Data In A Web-based 3D-Client". Not only are web-based open source 3D applications with a geographic reference constantly developing, but the development of standards and specifications for the presentation of 3D data on the web has also increasingly come into focus. A large number of libraries can be used for the representation on the web (e.g. x3dom, o3d, threejs, BabylonJS, Open GEE). Another library that has been growing steadily for several years is CesiumJS. This is used to process geographical questions in numerous areas. These include the real estate market, urban planning, sports or the various environmental sciences. In our talk we will present the current development status of the library and some possible use-cases of the features and data of CesiumJS will be briefly presented using projects as examples. A focus will also be placed on the requirements of the browser. In addition to the general availability and provision of data, the possible uses of individual selected features of the library will also be presented and discussed. When the world is represented digitally, corresponding data should also be placed there. Depending on the area of application, this can involve a relatively large amount of data, which is the case when dealing with underground data. Ideally this data should also be placed on the map in a simple way. There are already standards for the webbased-presentation of 2D-data in the web, new standards have been developed for the presentation of terrain, 3D models, buildings and point clouds as part of the development of CesiumJS. With 3D Tiles, an OGC community standard is now also available. Authors and Affiliations – Holthausen, Michael Adams, Till terrestris GmbH & Co KG Track – Software Topic – Data visualization: spatial analysis, manipulation and visualization Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

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name: 3D geo-applications with CesiumJS - data, possible use-cases and specifications


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description: Can we visualize a data set of millions of buildings smoothly even on mobile devices? Turns out we can! 3D BAG is a data set containing all buildings in the Netherlands in 3D and we built a viewer to allow users to see it through their browser. This is how we utilized 3D Tiles and three.js to build a viewer from scratch with the main focus on efficiency and the data itself. This is a presentation about the 3D BAG web viewer, which allows for the visualization of 11 million buildings in the Netherlands. We built the viewer from scratch, using three.js and 3DTilesRendererJS for the consumption of the data. During the process, we had to implement our own WMS/WMTS viewer for three.js and to optimize the creation of 3D Tiles. The main focus was to provide a smooth experience to the user, focusing mainly on the efficient streaming of the data. We also added some basic measuring tools for buildings (height and slope of surface). The source code of the viewer is available here. All software used in the process is FOSS. We hope to make this an independent platform for others to distribute similar data. This project has received funding from the European Research Council (ERC) under the European Unions Horizon2020 Research & Innovation Programme (grant agreement no. 677312 UMnD: Urban modelling in higher dimensions). Authors and Affiliations – Ravi Peters (1)(2) Stelios Vitalis (1) Jordi van Liempt (1) (1) 3D geoinformation research group, TU Delft, the Netherlands (2) 3DGI, the Netherlands Track – Software Topic – Software/Project development Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

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name: A fast web 3D viewer for 11 million buildings


A Multidisciplinary Exploration of FOSS

uk: Комп'ютерні науки

description: Python for Open Source GIS is multidisciplinary by nature and continually learning from adjacent disciplines. This talk will highlight how tools from the PyData community are augmenting the toolboxes of geospatial professionals. You will also come away with a sampling of key open source GIS tools that are being used across multiple disciplines. Description: The general format of the talk will be as follows: General overview of the multidisciplinary nature of FOSS tools Highlight of some recent interesting applications using FOSS Quick overview of some key libraries that are enhancing the multidisciplinary nature of FOSS tools Authors and Affiliations – Collins, Brendan (1) (1) makepath, U.S. Track – Use cases & applications Topic – Data visualization: spatial analysis, manipulation and visualization Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Al Accelerated Human-in-the-Loop schools and land use and land cover mapping for climate actions AI isn’t perfect when it comes to learning about complex satellite imagery and real-world features. On the other hand, only relying on humans to map complex features and objects is too tedious and slow. AI accelerated human-in-the-loop methods provide new approaches to quickly create map objects and features for climate actions with scalable cloud computing power and growing EO data. At Development Seed, we’ve been proudly working with two partners, UNICEF and Microsoft Planetary Computer, to bring AI accelerated human-in-the-loop methods to the hands of policymakers, scientists, and mappers for SGD and climate actions. In this talk, we would like to present: What are AI accelerated human-in-the-loop methods for SDG and climate action? How can we leverage the scalable methods in the era of growing EO data and cloud computing? How fast and scalable we can create accurate school and LULC maps for policymakers, scientists, and mappers. Please see the abstract above Authors and Affiliations – Development Seed Track – Open data Topic – FOSS4G implementations in strategic application domains: land management, crisis/disaster response, smart cities, population mapping, climate change, ocean and marine monitoring, etc. Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Access to high resolution data to support sustainable development activities, particularly for conservation and deforestation has often been limited by barriers of cost and licensing. Yet the benefit of higher resolution data provides opportunities for improved reporting, monitoring changes or high cadence updates not afforded by public sources alone. This was one of the reasons the Norwegian Ministry of Climate and Environment through NICFI funded the Global tropical forest program initiative to, for the first time ever, enable users to access high resolution data without these usual barriers. The program focuses on the purpose of reducing and reversing the loss of tropical forests and is designed to be as broad as possible to ensure it is useful for as many groups as possible. This presentation will introduce the program, the datasets and the various open tools that can be used to explore the data through case studies and applications. Authors and Affiliations – Charlotte Bishop, KSAT Tara O'Shea, Planet Track – Transition to FOSS4G Topic – FOSS4G implementations in strategic application domains: land management, crisis/disaster response, smart cities, population mapping, climate change, ocean and marine monitoring, etc. Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

uk: вхід без авторизації

name: An introduction to the open access high resolution tropical forest data program


uk: Комп'ютерні науки

description: In Pacific Island Countries, the environmental resources that support livelihoods are distributed across landscapes in a mix of spatial patterns. Capturing the spatial detail of landscape use is important to inform landscape management that is sensitive to these livelihood dependencies. Using information and communication technologies for development (ICT4D) and agile software development processes, a workflow was developed that comprises open-source geospatial software to map and monitor agricultural landscapes. This workflow was co-developed with the Vava’u branch of the Ministry of Agriculture, Food, Forests, and Fisheries (MAFF) of the Government of Tonga. The workflow consists of mobile GIS to map farms, web-applications to synchronise and store data, and spatial dashboards for data visualisation and analysis. Mobile geospatial data collection uses QField for intra-farm mapping of cropping practices and digital forms to record farm management attributes. A web application has been developed using Express and Python to support data syncing, automatically generating datasets for reporting on cropping practices and landscape conditions, and for secure data storage. A spatial dashboard, built using Shiny and Leaflet, allows non-GIS experts to easily query and visualise landscape data collected in the field and to use this data in landscape decision making. This workflow has been used by MAFF for an array of data collection and mapping campaigns. Example uses include: mapping the location of vanilla plantations under sub-optimal management condition; identifying where land was under-utilised or left fallow by farmer groups to spatially target fuel and cash resources to increase land under cultivation; and annual crop monitoring to generate island-wide coverage of intra-farm cropping practices to serve as baseline data to track agricultural change through time. This talk will discuss the software development process including: the needs assessment to identify and prioritise unmet needs for geospatial data and applications; requirements identification and analysis using use case modelling and rapid prototype development and testing; and refinement and deployment of the workflow for agricultural landscape monitoring on the island group of Vava’u. This talk will also elaborate on the implementations of the workflow, highlight lessons learnt through the development process, and highlight areas for future work and expansion. Authors and Affiliations – Duncan, John (1) Davies, Kevin (2) Saipaia, Ahi (3, 4) Varea, Renata (4) Vainikolo, Leody (3) Boruff, Bryan (1) Bruce, Eleanor (2) Wales, Nathan (3) (1) UWA School of Agriculture and Environment, The University of Western Australia, Australia (2) School of Geosciences, The University of Sydney, Sydney (3) Ministry of Agriculture, Food, Forests, and Fisheries, The Government of Tonga, The Kingdom of Tonga (4) Geography, Earth Science and Environment, The University of the South Pacific, Fiji Track – Use cases & applications Topic – FOSS4G implementations in strategic application domains: land management, crisis/disaster response, smart cities, population mapping, climate change, ocean and marine monitoring, etc. Level – 1 - Principiants. No required specific knowledge is needed. Language of the Presentation – English

uk: вхід без авторизації

name: An open-source geospatial workflow to map diverse landscapes in Pacific Island Countries


uk: Комп'ютерні науки

description: The OGC Application Programming Interface (API) suite of standards is a family of Web APIs that have been created as extensible specifications designed as modular building blocks that enable access to spatial data that can be used in data APIs. This presentation provides an insight into OGC API activities, developments and an outlook on what to expect in the last quarter of the year and 2022. And it will give an update on the "hot" topics around OGC APIs and OGC open standards, the collaboration of OSGeo and OGC and how we can further develop open standards together. This presentation provides an insight into OGC API activities, developments and an outlook on what to expect in the last quarter of the year and 2022. And it will give an update on the "hot" topics around OGC APIs and OGC open standards, the collaboration of OSGeo and OGC and how we can further develop open standards together. Authors and Affiliations – Trakas, Athina (1) Hobona, Gobe (1) (1) Open Geospatial Consortium Track – Software Topic – Standards, interoperability, SDIs Level – 2 - Basic. General basic knowledge is required. Language of the Presentation – English

uk: вхід без авторизації

name: API de OGC: antecedentes, estado actual, qué sigue


keywords:
FAIR principles
Open Knowledge Research Graph
TIB Terminology Service
ORKG

uk: Комп'ютерні науки

uk: Бібліотекознавство, документознавство

en: Information and Library Sciences

de: Geisteswissenschaften

uk: Гуманітарні науки

en: Humanities

description: The communication of scholarly knowledge has hardly changed for centuries: It's document-based - once as a classic paper essay, now as a PDF. With around 2.5 million new research articles published every year, researchers are drowning in a flood of PDFs, many of which are not machine-readable. We are rethinking knowledge communication: Instead of static PDFs, we are relying on knowledge graphs. TIB is working with partners to link knowledge in a wide variety of forms - texts, images, videos, 3D models and much more - using knowledge graphs. These are intended to represent different research ideas, methods and results in a machine-readable way, so that completely new connections of knowledge come to light. The major global challenges require interdisciplinarity and the merging of knowledge. The Open Research Knowledge Graph developed by TIB can make this possible and revolutionize the sharing of knowledge.

uk: вхід без авторизації

name: Helmholtz Information and Data Science Academy

name: Semantic Research Data Management and Organization of Scientific Contributions in the OKRG


cs: Matematika

de: Mathematik

fi: matematiikka

uk: Математика

en: Mathematics

fr: Mathématiques

da: Matematik

es: Matemáticas

nl: Wiskunde

de: Mathematik, Naturwissenschaften

uk: Математика, природничі науки

en: Mathematics, Natural Sciences

description: In this first lecture we will introduce some the main differences between the dynamics of polynomials and the dynamics of transcendental entire functions: Baker and wandering domains, the new features of the escaping set, new features in the Julia set and some information about parameter spaces for some specific classes of entire functions.

uk: вхід без авторизації

name: Polynomial versus transcendental dynamics

name: Centre International de Rencontres Mathématiques (CIRM)

addressCountry: FR

addressLocality: Marseille

addressRegion: Provence-Alpes-Côte d'Azur


keywords:
Transcendental dynamics
quasiconformal folding
postsingular set
Riemann surfaces

uk: Математика, природничі науки

description: I will introduce the Speiser and Eremenko-Lyubich classes of transcendental entire functions and give a brief review of quasiconformal maps and the measurable Riemann mapping theorem. I will then discuss tracts and models for the Eremenko-Lyubich class and state the theorem that all topological tracts can occur in this class. A more limited result for the Speiser class will also be given. I will then discuss some applications of these ideas, focusing on recent work with Kirill Lazebnik (prescribing postsingular orbits of meromorphic functions) and Lasse Rempe (equilateral triangulations of Riemann surfaces).

uk: вхід без авторизації

name: Transcendental functions with small singular sets


uk: Математика, природничі науки

description: Fatou noticed in 1926 that certain transcendental entire functions have Julia sets in which there are curves of points that escape to infinity under iteration and he wondered whether this might hold for a more general class of functions. In 1989, Eremenko carried out an investigation of the escaping set of a transcendental entire function f, $I(f)=\left \{ z\in\mathbb{C}:\left | f^{n}\left ( z \right ) \right | \rightarrow \infty \right \}$ and produced a conjecture with a weak and a strong form. The strong form asks if every point in the escaping set of an arbitrary transcendental entire function can be joined to infinity by a curve in the escaping set. This was answered in the negative by the 2011 paper of Rottenfusser, Rückert, Rempe, and Schleicher (RRRS) by constructing a tract that produces a function that cannot contain such a curve. In the same paper, it was also shown that if the function was of finite order, that is, log log $\left | f\left ( z \right ) \right |= \mathcal{O}\left ( log\left | z \right | \right )$ as $\left | z \right |\rightarrow \infty$, then every point in the escaping set can indeed be connected to infinity by a curve in the escaping set. The counterexample $f$ used in the RRRS paper has growth such that log log $\left | f\left ( z \right ) \right |= \mathcal{O}\left ( log\left | z \right | \right )^{k}$ where $K > 12$ is an arbitrary constant. The question is, can this exponent, K, be decreased and can explicit calculations and counterexamples be performed and constructed that improve on this?

uk: вхід без авторизації

name: Eremenko's conjecture, Devaney's hairs, and the growth of counterexamples


Introduction to Thurston's theorems

keywords:
Teichmüller theory
Thurston pull-back map
Skinning lemma

uk: Математика, природничі науки

description: W. Thurston's theorems almost all aim to give a purely topological problem an appropriate geometry, or to identify an appropriate obstruction.. We will illustrate this in two examples: --The Thurston pullback map to make a rational map from a post-critically finite branched cover of the sphere, and --The skinning lemma, to find a hyperbolic structure for a Haken 3-manifold. In both cases, either the relevant map on Teichmüller space has a fixed point, solving the geometrization problem, or there is an obstruction consisting a multicurve.

uk: вхід без авторизації


Wandering lakes of Wada

keywords:
lakes of Wada
transcendental dynamics
complex dynamics
wandering domains
entire functions
approximation

uk: Математика, природничі науки

description: We construct a transcendental entire function for which infinitely many Fatou components share the same boundary. This solves the long-standing open problem whether Lakes of Wada continua can arise in complex dynamics, and answers the analogue of a question of Fatou from 1920 concerning Fatou components of rational functions. Our theorem also provides the first example of an entire function having a simply connected Fatou component whose closure has a disconnected complement, answering a recent question of Boc Thaler. Using the same techniques, we give new counterexamples to a conjecture of Eremenko concerning curves in the escaping set of an entire function. This is joint work with Lasse Rempe and James Waterman.

uk: вхід без авторизації


keywords:
Cantor bouquet
transcendental entire maps
Julia set

uk: Математика, природничі науки

uk: вхід без авторизації

name: Entire functions with Cantor bouquet Julia sets


uk: Математика, природничі науки

description: One can associate with every finitely generated contracting self-similar group (for example, with the iterated monodromy group of a sub-hyperbolic rational function) and every positive p the associated \ell_{p}-contraction coefficient. The critical exponent of the group is the infimum of the set of values of p for which the \ell_{p}-contraction coefficient is less than 1. Another number associated with a contracting self-similar group is the Ahlfors-regular conformal dimension of its limit space. One can show that the critical exponent is not greater than the conformal dimension. However, the inequality may be strict. For example, the critical exponent is less than 1 for many groups of intermediate growth (while the corresponding conformal dimension is equal to 1 ). We will also discuss a related notion of the degree of complexity of an action of a group on a set.

uk: вхід без авторизації

name: Contracting self-similar groups and conformal dimension


Docile transcendental entire functions

keywords:
holomorphic dynamics
transcendental entire function
docile

uk: Математика, природничі науки

description: Several important problems in complex dynamics are centered around the local connectivity of Julia sets of polynomials and of the Mandelbrot set. Importantly, when the Julia set of a polynomial is locally connected, the topological dynamics ofthe map can be completely described as a quotient of a power map on the circle.Local connectivity of the Julia set is less significant for transcendental entire functions. Nevertheless, by restricting to a class of transcendental entire functions, known as docile functions, we obtain a similar concept by describing the topological dynamics as a quotient of a simpler disjoint-type map. We will discuss the notion ofdocile functions, as well as some of their properties. This is joint work with Lasse Rempe.

uk: вхід без авторизації


Quadratic polynomials

keywords:
Complex dynamics
self-similar groups
laminations
external angles
Hubbard trees

uk: Математика, природничі науки

description: Quadratic polynomials have been investigated since the beginnings of complex dynamics, and are often approached through combinatorial theories such as laminations or Hubbard trees. I will explain how both of these approaches fit in a more algebraic framework: that of iterated monodromy groups. The invariant associated with a quadratic polynomial is a group acting on the infinite binary tree, these groups are interesting in their own right, and provide insight and structure to complex dynamics: I will explain in particular how the conversion between Hubbard trees and external angles amounts to a change of basis, how the limbs and wakes may be defined in the language of group theory, and present a model of the Mandelbrot set consisting of groups. This is joint work with Dzmitry Dudko and Volodymyr Nekrashevych.

uk: вхід без авторизації


keywords:
renormalization
hyperbolicity
critical circle maps

uk: Математика, природничі науки

description: In this talk we study real analytic bi-cubic circle maps with bounded type rotation number. We define a suitable functional space where the renormalization operator is analytic, and we construct a hyperbolic attractor of renormalization with codimension-two stable foliation. This is joint work with Michael Yampolsky.

uk: вхід без авторизації

name: Hyperbolicity of renormalization for bi-cubic circle maps with bounded combinatorics


uk: Математика, природничі науки

description: We show the existence of transcendental entire functions $f: \mathbb{C} \rightarrow \mathbb{C}$ with Hausdorffdimension 1 Julia sets, such that every Fatou component of $f$ has infinite inner connectivity. We also show that there exist singleton complementary components of any Fatou component of $f$, answering a question of Rippon+Stallard. Our proof relies on a quasiconformal-surgery approach. This is joint work with Jack Burkart.

uk: вхід без авторизації

name: Transcendental Julia sets of minimal Hausdorff dimension


keywords:
Iterated monodromy group
transcendental dynamics
holomorphic

uk: Математика, природничі науки

description: Iterated monodromy groups are self-similar groups associated to partial selfcoverings. In my talk I will give an overview of iterated monodromy groups of post-singularly finite entire transcendental functions. These groups act self-similarly on a regular rooted tree, but in contrast to IMGs of rational functions, every vertex of the tree has countably infinite degree. I will discuss the similarities and differences of IMGs of entire transcendental functions and of polynomials, in particular in the direction of amenability.

uk: вхід без авторизації

name: Iterated monodromy groups and transcendental dynamics


Renormalization in complex dynamics

keywords:
Renormalization
complex dynamics
rigidity

uk: Математика, природничі науки

description: We discuss the idea of renormalization for complex dynamical systems. There various types of renormalizations defined via a first return map, appear in complex dynamics, for unimodal maps, homeomorphisms of circle, and germs of irrationally indifferent fixed points of holomorphic maps. The target of renormalization is usually tame and fragile dynamics and the connecting maps are often expanding maps and the exding property helps us to understand the rigid nature of the target maps. We propose the idea of dynamical charts for irrationally indifferent fixed points, in order to reconstruct the original map from the sequence of renormalizations.

uk: вхід без авторизації


keywords:
complex dynamics
extremal length
elastic networks
hyperbolic rational maps
Thurston obstruction
embedding energy
quasiconformal surgery

uk: Математика, природничі науки

description: We can conveniently represent post-critically finite topological branched selfcovers of the sphere to itself using maps of graphs. With this representation, there is also a positive characterization of hyperbolic rational maps among these topological branched self-covers, using energies that control elastic 'stretchiness'. In broad terms, a map is rational iff a network of elastic bands gets looser and looser as you pull it back. This complements the older negative characterization of W. Thurston.

uk: вхід без авторизації

name: Characterizing rational maps positively using graphs


uk: Математика, природничі науки

description: A fundamental fact about Riemann surfaces is that they degenerate in a specific pattern — along thin annuli or wide rectangles. As it was demonstrated by W. Thurston in his realization theorem, we can often understand the dynamical system by establishing a priori bounds (a non-escaping property) in the near-degenerate regime. Similar ideas were proven to be successful in the Renormalization Theory of the Mandelbrot set. We will start the talk by discussing a dictionary between Thurston and Renormalization theories. Then we will proceed to neutral renormalization associated with the main cardioid of the Mandelbrot set. We will show how the Transcendental Dynamics naturally appear on the renormalization unstable manifolds. In conclusion, we will describe uniform a priori bounds for neutral renormalization — joint work with Misha Lyubich.

uk: вхід без авторизації

name: Near-degenerate regime in neutral renormalization


keywords:
meronorphic functions
Julia sets
J-stability
virtual centers
bifurcations

uk: Математика, природничі науки

uk: вхід без авторизації

name: Meromorphic maps of finite type: parameter space


keywords:
Parabolic Mandelbrot set
parabolic Yoccoz puzzles
parabolic Yoccoz parameters
combinatorial analytic invariant

uk: Математика, природничі науки

description: In a recently completed paper Pascale Roesch and I have given a complete proof that the connectedness locus M_{1} in the space moduli space of quadratic rational maps with a parabolic fixed point of multiplier 1 is homeomorphic to the Mandelbrot set. In this talk I will outline and discus the proof, which in an essential way involves puzzles and a theorem on local connectivity of M_{1} at any parameter which is neither renormalizable nor has all fixed points non-repelling similar to Yoccoz celebrated theorem for local connectivity of M at corresponding parameters.

uk: вхід без авторизації

name: Dynamics preserving homeomorphism between M1 and M


keywords:
Thurston
Teichmüller space
transcendental entire function
iteration
complex dynamics

uk: Математика, природничі науки

description: In complex dynamics it is usually important to understand the dynamical behavior of critical (or singular) orbits. For quadratic polynomials, this leads to the study of the Mandelbrot set and of its complement. In our talk we present a classification of some explicit families of the transcendental entire functions for which all singular values escape, i.e. functions belonging to the complement of the 'transcendental analogue' of the Mandelbrot set. This classification allows us to introduce higher dimensional analogues of parameter rays and to explore their properties. A key ingredient is a generalization of the famous Thurston's Topological Characterization of Rational Functions, but for the case of infinite rather than finite postsingular set. Analogously to Thurston's theorem, we consider the sigma-iteration on the Teichmüller space and investigate its convergence. Unlike the classical case, the underlying Teichmüller space is infinite-dimensional which leads to a completely different theory.

uk: вхід без авторизації

name: Transcendental dynamics and infinite-dimensional Thurston theory


keywords:
Expanding Thurston map
visual metric
conformal dimension

uk: Математика, природничі науки

description: Every expanding Thurston map gives rise to a fractal geometry on its underlying 2-sphere. Many dynamical properties of the map are encoded in this fractal, called the 'visual sphere' of the map. An interesting question is how to determine the (Ahlfors regular) conformal dimension of the visual sphere if the map is obstructed. In my talk I will give an introduction to this subject and discuss some recent progress.

uk: вхід без авторизації

name: The visual sphere of an expanding Thurston map


keywords:
Renormalisation
irrationally indifferent cycles
Siegel disks
Cremer fixed points

uk: Математика, природничі науки

description: In this talk we present a toy model for the (sector) renormalisation of holomorphic maps with an irrationally indifferent fixed points. The model depends on the arithmetic of the rotation number at the fixed point, and exhibits the geometry of a non-degenerate holomorphic map with an irrationally indifferent fixed point. We present some sufficient conditions on a give (sector) renormalisation which guarantees the underlying map has the same dynamics as the one of the toy model.

uk: вхід без авторизації

name: Arithmetic geometric models for the renormalisation of irrationally indifferent attractors