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Open Source Geospatial Foundation
Open Source Geospatial Foundation
Open Source Geospatial Foundation
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The Open Source Geospatial Foundation (OSGeo), is a non-profit non-governmental organization whose mission is to support and promote the collaborative development of open geospatial technologies and data. The foundation was formed in February 2006 to provide financial, organizational and legal support to the broader Libre/Free and open-source geospatial community.[2] It also serves as an independent legal entity to which community members can contribute code, funding and other resources.

Key Information

OSGeo draws governance inspiration from several aspects of the Apache Foundation, including a membership composed of individuals drawn from foundation projects who are selected for membership status based on their active contribution to foundation projects and governance.

The foundation pursues goals beyond software development, such as promoting more open access to government produced geospatial data, FAIR_data geodata, and geodata created and maintained by the OpenStreetMap project. Education and training are also addressed. Various committees within the foundation work on implementing strategies.

Governance

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The OSGeo Foundation is community driven and has an organizational structure consisting of elected members and nine directors, including the president.[1] Software projects have their own governance structure, by requirement. see FAQ. The OSGeo community collaborates via a Wiki, Mailing Lists and IRC.

Projects

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Several OSGeo projects can communicate with each other and other geographical tools.

OSGeo projects include:

Geospatial Libraries

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  • FDO – API (C++, .Net) between GIS application and sources; for manipulating, defining and analyzing geospatial data.
  • GDAL/OGR – Library between GIS application and sources; for reading and writing raster geospatial data formats (GDAL) and simple features vector data (OGR).
  • GeoTools – Open source GIS toolkit (Java); to enable the creation of interactive geographic visualization clients.
  • GEOS – A C++ port of the Java Topology Suite (JTS), a geometry model.
  • MetaCRS – Projections and coordinate system technologies, including PROJ.
  • Orfeo ToolBox (OTB) – Open source tools to process satellite images and extract information.
  • OSSIM Extensive geospatial image processing libraries with support for satellite and aerial sensors and common image formats.
  • PostGIS – Spatial extensions for the PostgreSQL database, enabling geospatial queries.

Desktop Applications

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  • QGIS – Desktop GIS for data viewing, editing and analysis — Windows, Mac and Linux.
  • GRASS GIS – extensible GIS for image processing and analysing raster, topological vector and graphic data.
  • OSSIM – Libraries and applications used to process imagery, maps, terrain, and vector data.
  • Marble – Virtual globe and world atlas.
  • gvSIG – Desktop GIS for data capturing, storing, handling, analysing and deploying. Includes map editing.

Web Mapping

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Server

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  • MapServer – Fast web mapping engine for publishing spatial data and services on the web; written in C.
  • Geomajas – Development software for web-based and cloud based GIS applications.
  • GeoServer – Allows users to share and edit geospatial data. Written in Java using GeoTools.
  • deegree – Java framework
  • PyWPS – implementation of the OGC Web Processing Service standard, using Python
  • pygeoapi - A Python server implementation of the OGC API suite of standards for geospatial data.

Client

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  • GeoMoose – JavaScript Framework for displaying distributed GIS data.
  • Mapbender – Framework to display, overlay, edit and manage distributed Web Map Services using PHP and JavaScript.
  • MapGuide Open Source – Platform for developing and deploying web mapping applications and geospatial web services. Windows-based, native file format.
  • MapFish – Framework for building rich web-mapping applications based on the Pylons Python web framework.
  • OpenLayers – AJAX library (API) for accessing geographic data layers of all kinds.

Specification

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Metadata Catalog

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Content Management Systems

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  • GeoNode

Outreach Projects

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  • Geo for All – Network of educators promoting Open Source geospatial around the world.
  • OSGeoLive – Bootable DVD, USB thumb drive or Virtual Machine containing all OSGeo software.
  • OSGeo4W – a binary distribution of a broad set of open source geospatial software for Windows

Retired Projects

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  • Community MapBuilder[3]

Events

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The FOSS4G ribbon.

OSGeo runs an annual international conference called FOSS4G – Free and Open Source Software for Geospatial. Starting as early as 2006, this event has drawn over 1100 attendees (2017 Boston) and the tendency is to increase this number every year. It is the main meeting place and educational outreach opportunity for OSGeo members, supporters and newcomers - to share and learn from one another in presentations, hands-on workshops and a conference exhibition. The FOSS4G ribbon, part of every FOSS4G event logo, symbolizes the flow of ideas, innovation, and sharing within the Open Source geospatial community. The event history dates back to an important face-to-face meeting of the 3 original founders of the event (Venkatesh Raghavan, Markus Neteler, and Jeff McKenna), who met initially in Bangkok Thailand in 2004, and planned to create a new annual event for the whole Open Source geospatial community, with the event named "FOSS4G"; the event would go on to help change the history of the geospatial industry.

There are also many regional and local events following this FOSS4G philosophy.[4]

Community

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The OSGeo community is composed of participants from everywhere in the world. As of 24 May 2020, there were 35,176 unique subscribers to the more than 384 OSGeo mailing lists. As of September 2012, OSGeo projects were built upon over 12.7 million lines of code contributed by 657 code submitters including 301 that have contributed within the last 12 months.[5]

Sol Katz Award

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The Sol Katz Award for Geospatial Free and Open Source Software (GFOSS) is awarded annually by OSGeo to individuals who have demonstrated leadership in the GFOSS community. Recipients of the award have contributed significantly through their activities to advance open source ideals in the geospatial realm.

See also

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References

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[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Open Source Geospatial Foundation

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The Open Source Geospatial Foundation (OSGeo) is a not-for-profit organization dedicated to fostering the global adoption of open geospatial technology through an inclusive software foundation that emphasizes open philosophy and community-driven development. Founded in February 2006 in Delaware, United States, following an initial organizing meeting in Chicago, OSGeo was established to provide a supportive framework for collaborative open source geospatial initiatives, initially incorporating eight flagship projects: GDAL/OGR, GeoTools, GRASS GIS, Mapbender, MapBuilder, MapGuide Open Source, MapServer, and OSSIM. OSGeo's origins trace back to early 2006, when members of the geospatial community, including developers from various projects, convened to create a centralized for advancing free and geospatial software amid growing interest in collaborative development. The foundation quickly formalized its structure as a membership-based without shareholders, electing a from charter members and obtaining 501(c)(4) tax-exempt status in the U.S. in 2013 to enable sustainable funding through sponsorships and donations. Over the years, OSGeo has expanded its reach, incubating new projects through a rigorous process that ensures adherence to principles, OSI-certified licenses (such as MIT, GPL, and LGPL), and community governance. Today, OSGeo oversees dozens of prominent projects that power geospatial analysis, mapping, and data processing worldwide, including for desktop GIS applications, GDAL for data translation, PROJ for cartographic projections, for , and for extensions. The foundation's core activities include providing legal and financial support to these projects, promoting interoperability with standards from partners like the Open Geospatial Consortium (OGC) via a 2008 , and facilitating global collaboration through local chapters in numerous countries worldwide. Additionally, OSGeo hosts the annual Free and Open Source Software for Geospatial (FOSS4G) conference, which serves as a premier event for knowledge sharing and networking, with the 2025 edition held in Auckland, , from November 17–23. A key pillar of OSGeo's outreach is the GeoForAll initiative, launched to advance open education in geospatial technologies by partnering with universities and labs to provide free access to teaching resources, software, and research opportunities, underscoring the belief that geospatial knowledge should be a public good. Through these efforts, OSGeo has become a vital hub for innovation in fields like environmental monitoring, urban planning, and disaster response, empowering developers, educators, and users with flexible, cost-free tools that drive widespread adoption of open geospatial solutions.

History and Founding

Founding and Early Years

The Open Source Geospatial Foundation (OSGeo) was established on February 4, 2006, during an inaugural meeting in , , , aimed at creating a dedicated for geospatial software efforts. This gathering marked the formal inception of OSGeo as a supportive entity for the growing libre and open-source geospatial community, which had previously lacked centralized financial, organizational, and legal backing to ensure long-term project viability. The foundation's initial board of directors comprised key figures from the geospatial open source landscape: Arnulf Christl (associated with Mapbender and CCGIS, Germany), Chris Holmes (GeoServer and GeoTools, The Open Planning Project, USA), Gary Lang (Refractions Research, Canada), Markus Neteler (GRASS GIS, Italy), and Frank Warmerdam (GDAL/OGR, Canada). These founders recognized the need for a neutral, not-for-profit structure to facilitate donations, sponsorships, and collaborative development, addressing sustainability challenges faced by individual projects. OSGeo was incorporated as a not-for-profit corporation in the state of Delaware, with intentions to seek tax-exempt status under Section 501(c)(3) of the U.S. Internal Revenue Code, though it ultimately received 501(c)(4) designation as a social welfare organization in 2013. In its early years, OSGeo prioritized building foundational mechanisms to support community growth. By late February 2006, it launched the Project Incubation Committee to evaluate and integrate promising geospatial projects through a rigorous process ensuring open licensing, documentation, and community governance. Concurrently, initial sponsorship drives were initiated to secure funding from industry partners, enabling operational stability and outreach efforts such as the first for (FOSS4G) conference in 2006. These activities laid the groundwork for OSGeo's role in fostering global collaboration, though its expansion into a broader international foundation unfolded in subsequent years.

Key Milestones and Growth

In 2008, the Open Source Geospatial Foundation (OSGeo) marked a significant step in its international expansion by hosting the first for Geospatial (FOSS4G) conference outside in , , from September 29 to October 3, attracting around 500 participants including programmers, government officials, and technology experts. This event underscored OSGeo's growing global footprint and commitment to fostering open geospatial communities in emerging regions. During the 2010s, OSGeo experienced substantial growth in its project ecosystem, with the number of projects entering incubation or achieving surpassing 30 by the mid-decade, including notable advancements like the graduation of pycsw in 2015 after powering initiatives such as data.gov. This expansion reflected the foundation's rigorous incubation process, which mentors projects toward full OSGeo recognition and excellence in open geospatial software development. Concurrently, OSGeo established local chapters worldwide to support regional users and developers, with examples including the Regional Chapter in 2012 and the official chapter in recent years, enabling grassroots activities and localized advocacy for open technologies. Entering the 2020s, OSGeo adapted swiftly to global challenges by transitioning FOSS4G and other events to virtual formats during the , ensuring continued community engagement through online workshops and presentations starting in 2020. By 2020, OSGeo's mailing lists had grown to over 35,000 unique subscribers across more than 384 lists, demonstrating the foundation's expanding influence in the geospatial community. Strengthening its collaborative network, OSGeo formalized partnerships with organizations like , including a 2021 Memorandum of Understanding with the to promote open source tools for and humanitarian action. On the legal and financial fronts, OSGeo solidified its status as a 501(c)(4) non-profit providing to open geospatial projects, which allows sponsored initiatives to leverage OSGeo's infrastructure while maintaining independence. While OSGeo itself holds 501(c)(4) status, it provides under 501(c)(3) through partnered mechanisms, allowing tax-deductible contributions to supported projects. The foundation developed a diverse sponsorship model encompassing levels from sustaining to diamond tiers, supported by contributors such as GeoCat, a longtime leader in geospatial services that committed to diamond-level sponsorship to fund OSGeo's activities and events. As of 2025, OSGeo continues to emphasize inclusivity and the role of open geospatial technologies in digital public infrastructure, exemplified by events like FOSS4G 2025 in , , from July 14 to 20, which featured sessions on digital inclusion, open school mapping, and through tools like and QField. This focus aligns with OSGeo's ongoing efforts to build diverse, accessible communities and advance for global challenges.

Mission and Principles

Core Objectives

The Open Source Geospatial Foundation (OSGeo) operates as a with a core mission to foster global adoption of open geospatial technology by serving as an inclusive software foundation devoted to an open philosophy and participatory community-driven development. This mission emphasizes building a collaborative where geospatial tools and resources are developed and shared openly, enabling widespread access without barriers imposed by proprietary systems. OSGeo's vision is to empower everyone with geospatial solutions, providing accessible and collaborative tools and data that support individuals, organizations, and communities in addressing spatial challenges. This vision underscores the foundation's commitment to democratizing geospatial technology, ensuring that high-quality, customizable software and data resources are available to users worldwide, from researchers to governments. At the heart of OSGeo's principles is the promotion of -approved licenses, which guarantee free access to software projects and encourage unrestricted modification and distribution. The foundation also prioritizes interoperability through adherence to standards such as those from the Open Geospatial Consortium (OGC), facilitating seamless integration of diverse geospatial tools and data sources, including open resources like government datasets and . These principles reject proprietary lock-in, advocating instead for transparent, community-led approaches that enhance innovation and reduce dependency on closed systems. OSGeo's focus areas include supporting software development through community contributions, project incubation, and maintenance to sustain robust open geospatial libraries and applications. It advances education by developing open curricula and resources to build skills in geospatial technologies, while actively promoting advocacy efforts that highlight the benefits of over proprietary alternatives in fields like mapping, analysis, and . Through these efforts, OSGeo aims to create a sustainable, inclusive environment that accelerates the global use of open geospatial solutions.

Advocacy for Open Geospatial Technologies

The Open Source Geospatial Foundation (OSGeo) actively lobbies for greater open access to public geospatial data through initiatives like the Public Geospatial Data Project, which promotes the availability of state-collected geodata to demonstrate its economic value and foster research and collaboration. This effort aligns with broader advocacy to enhance data accessibility, emphasizing best practices for large-scale usage scenarios in open formats. OSGeo also maintains strong partnerships with the Open Geospatial Consortium (OGC), having signed a Memorandum of Understanding in 2008 and renewed it in 2022 to advance open geospatial standards and software interoperability. Through this collaboration, OSGeo contributes reference implementations for key OGC standards, such as Web Map Service (WMS) and Web Feature Service (WFS), enabling seamless data sharing across diverse platforms. In the realm of educational promotion, OSGeo's GeoForAll initiative serves as a cornerstone, functioning as the foundation's educational outreach committee dedicated to integrating open source geospatial tools into academic curricula worldwide. GeoForAll collaborates with international bodies like the International Cartographic Association (ICA), International Society for Photogrammetry and Remote Sensing (ISPRS), and Association of Geographic Information Laboratories for Europe (AGILE) to develop open educational materials, establish GeoForAll Labs, and eliminate the digital divide by providing free access to geospatial knowledge. This program underscores the principle that knowledge is a public good, empowering students and educators with marketable skills in open source GIS without reliance on proprietary systems. OSGeo drives community-led campaigns to encourage government adoption of its tools, showcasing successful migrations and implementations, such as the use of MapServer in as of the early 2010s, where installations outnumbered ones. These efforts include sharing case studies of geospatial software in applications, promoting cost-effective alternatives for and . Regarding licensing, OSGeo opposes restrictive practices by advocating exclusively for OSI-certified licenses in its projects, which avoid and ensure greater user control compared to models. While respecting software's role, OSGeo's focus on open principles actively counters limitations imposed by closed licensing in geospatial software. The foundation's advocacy has significantly impacted global standards and sectoral applications, with OSGeo's contributions to OGC processes enhancing the adoption of interoperable standards like WMS and WFS globally. This has led to increased use of OSGeo tools in environmental monitoring, where open source platforms support air quality analysis and risk assessment, and in urban planning, facilitating scenario modeling and public participation in city development. For instance, projects like those from mundialis leverage OSGeo software for customized solutions in these sectors, demonstrating scalable, community-driven innovations that align with sustainable development goals. OSGeo's efforts also align with international frameworks like the Group on Earth Observations (GEO) Work Programme 2023-2025, supporting open data initiatives for the UN Sustainable Development Goals (SDGs) in geospatial applications.

Governance

Organizational Structure

The Open Source Geospatial Foundation (OSGeo) is incorporated as a not-for-profit membership corporation under the laws of the State of Delaware, , and holds 501(c)(4) tax-exempt status as a social welfare organization. This legal framework enables OSGeo to operate independently while providing options for international chapters and projects, facilitating global collaboration without direct financial oversight from the U.S. entity. OSGeo's governance is structured around a , consisting of 5 to 9 elected members who oversee the foundation's affairs, set policies, and manage operations. While the bylaws allow for 5 to 9 members, the board currently consists of 9 directors as of 2025. The board establishes various standing committees to handle specific functions, such as the Incubation Committee, which evaluates and mentors prospective projects for integration into the OSGeo ecosystem, and the Conference Committee, which coordinates annual events like FOSS4G. Additionally, each OSGeo project maintains its own Project Steering Committee to guide development, ensuring decentralized yet aligned decision-making across initiatives. Collaboration within OSGeo relies on open, community-driven tools, including the OSGeo Wiki for documentation and knowledge sharing, mailing lists for discussions and announcements, IRC channels for real-time communication, and the platform for moderated forums and threaded conversations. To promote an inclusive environment, OSGeo enforces a that applies to all forums, events, and interactions, emphasizing respect, diversity, and accessibility, with dedicated oversight by the Code of Conduct Committee. The foundation supports global chapters to extend its reach and foster local participation, encouraging underrepresented voices in open geospatial development.

Board, Elections, and Leadership

The Open Source Geospatial Foundation (OSGeo) is governed by a consisting of nine individuals elected by its charter members to serve two-year terms, with board members serving staggered terms—approximately half the seats up for election each year. The board as of November 2025 includes members elected in 2023 (serving until November 2025) and 2024 (serving until November 2026). This staggered structure ensures continuity. The board collectively directs the foundation's strategic vision, including oversight of financial resources and community initiatives. Elections for the board occur annually and are managed by a Chief Returning Officer (CRO), an independent member appointed to oversee the process impartially. Nominations open for a one-week period, during which members—individuals recognized for significant contributions to geospatial technologies—submit candidates via email to the CRO; nominees must themselves be members, and the CRO verifies their willingness to serve before publicizing the slate on OSGeo's discussion lists for community input. Voting follows shortly after, lasting about one week, with members (numbering over 500 as of recent elections) casting ballots by ranking up to the number of open seats; the CRO tallies votes confidentially and announces results publicly, resolving any ties randomly. In the 2024 election, for instance, 310 of 568 eligible members participated, electing Angelos Tzotsos, Tom Kralidis, Joana Simões, and Michael Smith to fill four seats. Leadership within OSGeo is provided by the board president and other officers, who are appointed by the board to coordinate specific committees and operations. As of November 2025, Angelos Tzotsos serves as president, a role he has held in recent terms following his reelection in 2024; historically, figures like Tzotsos have guided the foundation through periods of project growth and community expansion. Officers, such as those leading finance or conference committees, support the board by implementing directives and reporting on activities, ensuring alignment with OSGeo's principles. The board's decision-making authority encompasses setting the foundation's overall vision, approving annual budgets, and addressing legal and operational matters on behalf of the community. For 2025, the board allocated resources including a $7,000 USD for its own operations, with additional funds directed to committees for support, events like FOSS4G, and community outreach—totaling broader expenditures across geospatial initiatives. These decisions are typically made during regular meetings, often virtually, and documented publicly to maintain transparency. Charter membership, which forms the electorate for board elections, is granted to individuals demonstrating sustained contributions to OSGeo's mission, such as developing software projects or organizing events; existing members nominate and vote on candidates twice yearly. As of 2025, the foundation has over 500 active charter members, with nominations for new members opening in October to recognize ongoing community involvement. This selective process ensures that leadership reflects the diverse expertise of the global open geospatial community.

Software Projects

Geospatial Libraries

The Open Source Geospatial Foundation (OSGeo) supports several foundational libraries that enable geospatial data processing, translation, and analysis, serving as building blocks for higher-level applications in geographic information systems (GIS). These libraries provide APIs and tools for handling raster and vector data, performing geometric computations, managing coordinate transformations, and extending databases with spatial capabilities. They are widely adopted due to their robustness, extensibility, and compliance with open standards, facilitating interoperability across diverse geospatial workflows. One of the cornerstone projects is GDAL/OGR, a C++ translator library for raster (GDAL) and vector (OGR) geospatial data formats. It supports over 200 formats, including , , and KML, allowing seamless data conversion, warping, and mosaicking through a unified and command-line utilities like gdal_translate and ogr2ogr. GDAL/OGR is essential for building data pipelines, as it integrates with Open Geospatial Consortium (OGC) standards such as and (WMS), enabling format-agnostic processing in server-side and scripting environments. Released under an MIT-style , it is maintained by a global community of developers, with active contributions driving regular updates, such as the 3.12.0 release in November 2025. For instance, GDAL/OGR powers backend data ingestion in mapping applications like and cloud-based geospatial pipelines on platforms like Google Earth Engine. GEOS (Geometry Engine – Open Source) provides C++ libraries for operations critical to GIS analysis, ported from the Java Topology Suite (JTS). It implements the OGC specification, offering spatial predicates (e.g., intersects, contains, touches) and operations (e.g., union, intersection, buffer, ) on two-dimensional geometries like points, linestrings, and polygons. Key features include thread-safe APIs, STRtree spatial indexing for efficient queries, and input/output support for Well-Known Text (WKT) and Well-Known Binary (WKB) formats. Licensed under the GNU Lesser General Public License (LGPL), GEOS is a core dependency for vector processing in numerous tools and has been contributed to by over 70 developers on , ensuring ongoing enhancements for performance and precision. It commonly serves as the backend for geometric computations in pipelines, such as validating topology in datasets. GeoTools is an Java toolkit that delivers standards-compliant methods for accessing, manipulating, and rendering geospatial data and web services. It supports OGC standards including (WFS), Web Coverage Service (WCS), and Styled Layer Descriptor (SLD), with modules for data I/O (e.g., , ), styling, rendering, and analysis like reprojection and buffering. The library's allows developers to integrate specific components, such as its coverage for raster handling or for vector data. Distributed under the LGPL, GeoTools benefits from a vibrant community of over 270 contributors, fostering continuous improvements in and performance. It is frequently used as the foundational layer in Java-based geospatial applications for tasks like dynamic map generation from heterogeneous data sources. PostGIS extends the relational database management system with spatial capabilities, adding support for storing, indexing, and querying geometry, geography, raster, and topology data types. It includes GiST-based spatial indexes for fast spatial joins and functions for analysis, such as distance calculations, area computations, intersections, and geocoding via extensions like pgRouting. Compliant with OGC and SQL/MM standards, PostGIS handles 2D/3D geometries and raster data for applications like environmental modeling. Licensed under the GNU General Public License (GPL) version 2 or later, it is developed by a dedicated team with over 90 contributors, including core enhancements in versions like 3.6.1 for improved raster support and other features. PostGIS often underpins database-driven geospatial pipelines, enabling efficient querying of large-scale datasets in web services and analytics platforms. PROJ is a cartographic projections and coordinate transformation library that converts geospatial coordinates between different coordinate reference systems (CRS), supporting datum transformations and map projections. It handles over 100 projections (e.g., Mercator, UTM) and geodetic techniques like Helmert transformations, with command-line tools (proj) and a C API for programmatic use, including grid-based shifts for high accuracy. Aligned with OGC and ISO 19111 standards, PROJ ensures precise reprojection in multi-CRS environments. Released under an X/MIT open source license, it is actively maintained under OSGeo with contributions from a diverse developer base, as seen in releases like 9.7.0. PROJ is integral to backend coordinate handling in workflows, such as aligning with ground control points in pipelines. Collectively, these libraries are licensed under permissive terms like MIT and LGPL, promoting reuse and integration while adhering to OGC standards for . In recent years, they have attracted over 300 active contributors across projects, reflecting robust involvement in addressing evolving needs like cloud-native processing and . Their role as foundational components underscores OSGeo's commitment to enabling scalable geospatial infrastructure.

Desktop Applications

The Open Source Geospatial Foundation (OSGeo) supports a range of standalone desktop applications that enable users to visualize, edit, and analyze geospatial locally on personal computers, without reliance on web servers. These tools are designed for professional and educational use, offering robust capabilities for handling raster, vector, and other types across multiple operating systems including Windows, macOS, and . Among the prominent OSGeo desktop projects is , a multi-platform (GIS) that allows users to create, edit, visualize, analyze, and publish geospatial information. serves as a powerful engine for raster and vector data processing, supporting advanced modeling, analysis, and spatial data management with over 350 integrated modules. gvSIG Desktop provides an interoperable GIS environment for working with diverse vector and raster formats, databases, and remote services, including tools for querying, editing, and thematic mapping. functions as a virtual globe and world atlas, enabling 3D navigation of planetary maps with layers such as topographic, satellite, and historical views, suitable for educational and exploratory purposes. These applications feature advanced querying mechanisms, such as spatial selections and attribute-based filters, alongside extensible plugin ecosystems that allow customization for specific workflows; for instance, QGIS's plugin repository includes thousands of community-contributed extensions for tasks like data import and advanced symbology. Cross-platform compatibility ensures seamless operation across environments, while integration with core geospatial libraries like GDAL enhances support for over 200 raster and vector formats, facilitating data translation and processing without proprietary dependencies. QGIS stands as OSGeo's flagship desktop application, boasting widespread adoption with over 900,000 downloads/opens in 2025 indicating a large active user base and numerous financial supporters through sustaining memberships, and is extensively used in academia for research, by government agencies for planning, and by non-governmental organizations for environmental monitoring. is similarly valued in scientific communities for its analytical depth, while gvSIG and contribute to broader accessibility in and applications, though with more niche user bases compared to QGIS. Development of these projects is community-driven, with regular releases coordinated through OSGeo's collaborative processes; for example, the 3.x series has introduced enhancements like improved 3D visualization, advanced geoprocessing tools, and better data source management, culminating in versions such as 3.44 with refined 3D map views, workflow optimizations, and additional features. GRASS GIS's recent 8.4 series releases added support for experimental features like import and object-based classification, along with further enhancements, while gvSIG Desktop 2.5.1 incorporated improvements in format handling and usability, all sustained by volunteer contributors and OSGeo's incubation oversight.

Web Mapping Servers

The Open Source Geospatial Foundation (OSGeo) supports several prominent projects that facilitate server-side rendering and serving of geospatial data over the web, enabling efficient distribution of maps and features through standardized protocols. These servers are designed to handle dynamic data processing, integration with spatial databases, and compliance with Open Geospatial Consortium (OGC) standards, making them essential for building scalable geospatial web services. GeoServer is a OSGeo project that serves as an OGC-compliant server for sharing and editing geospatial data, supporting protocols such as (WMS) for raster maps, (WFS) for vector data including transactional edits (WFS-T), and (WMTS) for tiled imagery delivery. It features dynamic data styling through Styled Layer Descriptor (SLD) profiles, allowing for scale-dependent rendering, labeling, and filtering of features. GeoServer integrates seamlessly with databases like for vector data and supports raster formats via GDAL, enabling on-the-fly projections and processing. Common use cases include enterprise web mapping applications and providing API endpoints for geospatial data access in spatial data infrastructures (SDIs). Over time, GeoServer has evolved to incorporate modern capabilities, such as Web Processing Service (WPS) for executing geospatial algorithms and integration with GeoWebCache for efficient tiling and caching. MapServer, another core OSGeo initiative, excels in fast map rendering as an open-source platform written primarily in C for high-performance web mapping. It implements OGC protocols including WMS, WFS, WMTS, and Web Coverage Service (WCS), with support for output formats like GeoJSON and KML. Dynamic styling is achieved via configuration files that enable advanced cartographic features, such as label collision avoidance, heatmaps, and multiple rendering engines (e.g., AGG, Cairo). MapServer connects to PostGIS and other data sources through GDAL/OGR libraries, supporting on-the-fly reprojection with PROJ. It is widely used for enterprise web mapping and API endpoints, particularly in tile-based services via its MapCache extension. Originating in the mid-1990s at the University of Minnesota, MapServer has seen continuous updates under OSGeo's stewardship, enhancing its role in large-scale web applications. deegree provides standards-based web services as a Java-based OSGeo project focused on OGC and ISO TC 211 compliance, serving as a reference implementation for protocols like WMS (versions 1.1.1 and 1.3.0), WFS (1.0.0, 1.1.0, 2.0.0), and WMTS (1.0.0). It supports dynamic data styling with SLD/SE (1.0.0 and 1.1.0) for thematic mapping and includes services like Catalogue Service for the Web (CSW 2.0.2), WCS, and WPS (1.0.0). Integration extends to PostGIS, Oracle Spatial, Microsoft SQL Server, and file-based sources like Shapefiles and GeoTIFF. deegree is employed in enterprise GIS for data management, visualization, discovery, and secure SDI deployments. Developed since 2000 by lat/lon and incubated into OSGeo in 2010, it has transitioned to community-driven enhancements for broader geospatial web interoperability. pygeoapi represents a modern evolution in OSGeo's servers, implementing lightweight OGC standards in Python for RESTful geospatial services launched in 2018. It supports emerging protocols such as OGC - Features, Coverages, Maps, Processing, Records, and Tiles, along with and SpatioTemporal Asset Catalog (STAC). The project emphasizes dynamic extensibility through a plugin framework for custom data providers, processes, and outputs, with easy deployment via Docker or pip. While it integrates with databases and file-based sources, pygeoapi focuses on lightweight endpoints for modern web applications, facilitating efficient data serving without heavy overhead. Its development aligns with OGC's next-generation initiatives, promoting accessibility for contemporary geospatial workflows.

Web Mapping Clients

The Open Source Geospatial Foundation (OSGeo) supports several client-side tools designed for interactive web-based map visualization, enabling users to render, navigate, and interact with geospatial data directly in web browsers. These tools emphasize accessibility, standards compliance, and extensibility, allowing developers to integrate dynamic maps into applications without proprietary dependencies. Key projects in this category include , Mapbender, GeoMoose, and MapGuide Open Source, each providing distinct capabilities for layer handling, user interfaces, and data integration. OpenLayers is a JavaScript library that facilitates the creation of dynamic maps on web pages, supporting the display of map tiles, vector data, and markers from diverse sources. It offers features such as tiled and vector layers, with controls for zooming, panning, and layer opacity management, alongside mobile responsiveness for cross-device compatibility. OpenLayers adheres to Open Geospatial Consortium (OGC) standards, including (WMS), (WFS), and Well-Known Text (WKT), enabling seamless integration with server-side data sources. Applications include embedding interactive maps in websites and building custom geospatial dashboards, with community-driven extensions enhancing functionality through plugins for advanced interactions. Mapbender serves as a PHP-based geoportal framework for managing and visualizing spatial infrastructures, allowing users to publish, navigate, and secure access to OGC services without extensive coding. Core features encompass layer management via a searchable service repository, user controls for querying and digitization, mobile-optimized templates, and tools for web-based printing and GPS positioning. It supports OGC standards like WMS and with Transactions (WFS-T), ensuring interoperability with standard geospatial protocols. Typical uses involve creating intuitive applications for public portals or administrative dashboards, bolstered by community contributions such as custom modules developed by groups like WhereGroup. GeoMoose functions as an AJAX-based web viewer and framework for rendering distributed cartographic data, prioritizing lightweight server requirements and . It includes interactive elements like searchable layer catalogs, opacity and stacking controls, polygon-based queries, and PDF export, with support for both mobile and desktop environments. Compatibility with OGC formats such as WMS, WFS, (GML), and (KML) allows for efficient data handling from various providers. GeoMoose is applied in scenarios requiring scalable map interfaces for large user bases, such as municipal planning tools, with extensions contributed by the community for enhanced query linking and buffering operations. MapGuide Open Source provides an enterprise-grade for deploying interactive mapping applications, featuring AJAX-based viewers for via points, polygons, or radii, alongside and high-quality rendering with dynamic labeling. It incorporates user controls for map navigation and , with through a secure , and supports mobile access across platforms like Windows and . The tool implements OGC standards including WMS and WFS, facilitating uniform access to data from sources like or formats. Common applications encompass custom services for organizational dashboards, supported by community efforts in extensions for manipulation and handling.

Metadata and Content Systems

The Open Source Geospatial Foundation (OSGeo) supports key projects focused on metadata and systems to enable the cataloging, sharing, and discovery of geospatial resources. GeoNode serves as a prominent web-based (CMS) for geospatial data, allowing users to upload, manage, and publish datasets alongside associated metadata and interactive maps. It facilitates the creation of spatial data infrastructures (SDIs) by providing an intuitive interface for non-specialists to handle geospatial content securely and collaboratively. GeoNode incorporates features aligned with international standards, including support for ISO 19115 and ISO 19139 metadata schemas, which ensure consistent documentation of geospatial datasets' lineage, quality, and extent. It integrates with the Open Geospatial Consortium (OGC) Catalog Service for the Web (CSW) to enable metadata harvesting and discovery through standardized portals, promoting across SDIs. Enhancements in GeoNode include collaborative editing tools for metadata and data layers, for resources, and access for programmatic integration, allowing developers to extend functionality for custom workflows. Complementing GeoNode, pycsw functions as an OGC-compliant CSW server implemented in Python, designed specifically for publishing and querying in repositories. It supports ISO 19115 metadata standards through its CSW 2.0/3.0 interfaces, enabling efficient discovery and retrieval of spatial data via multiple protocols such as OpenSearch, OAI-PMH, and SRU. As a lightweight component for SDIs, pycsw integrates with platforms like GeoNode and to support transactional metadata operations and has seen developments in OGC - Records compliance for modern, RESTful access to catalogs. These tools collectively advance by providing robust, standards-based systems for metadata management within OSGeo's ecosystem.

Outreach and Distribution Initiatives

The Open Source Geospatial Foundation (OSGeo) promotes the accessibility and adoption of open geospatial technologies through targeted outreach and distribution initiatives that provide user-friendly tools for education, testing, and deployment. These efforts emphasize pre-configured software environments, enabling newcomers and experts alike to explore geospatial applications without complex setup requirements. By bundling software, documentation, and sample data, OSGeo lowers , supporting global and practical learning. A cornerstone of these initiatives is OSGeoLive, a self-contained bootable distribution available as a DVD, USB drive, or virtual machine based on Lubuntu Linux. It offers pre-configured environments for over 50 open source geospatial software packages, categorized into desktop GIS tools like QGIS and GRASS GIS, web services such as GeoServer and MapServer, data stores including PostGIS, and libraries like GDAL/OGR and PROJ. Quickstart tutorials serve as training materials, guiding users through basic workflows with included sample datasets, while many applications support multilingual interfaces to broaden accessibility. OSGeoLive is widely used in workshops and classrooms globally to facilitate hands-on training and demonstrations, with annual releases—such as version 17.0 in August 2025—aligning updates with the latest stable project versions to maintain relevance and compatibility. Complementing this, OSGeo4W provides a binary distribution and installer specifically for Windows environments, from to 11, making open geospatial software readily available to users in that ecosystem. It includes key applications like and , along with essential libraries such as PROJ, GDAL/OGR, GEOS, and SpatiaLite, delivered via an intuitive setup process with express options for quick installations of core packages or advanced customization for paths, proxies, and caching. The installer supports easy updates by re-running the process, ensuring users can maintain current versions without manual intervention, and contributes to pre-configured testing environments for development builds. While primarily English-based, the installer framework allows for translations to enhance multilingual support. OSGeo4W's community-driven maintenance under OSGeo fosters reliable distribution for professional and educational use on Windows. GeoForAll, OSGeo's dedicated educational outreach committee, advances distribution through a network of global laboratories and resource-sharing platforms, collaborating with organizations like the International Cartographic Association (ICA), International Society for Photogrammetry and Remote Sensing (ISPRS), and others. It establishes and supports over 100 educational labs worldwide, providing open access to geospatial tools, curricula, and training materials to promote inclusivity and eliminate digital divides in education. Features include multilingual webinars, newsletters archiving best practices, and guides for integrating OSGeo software into teaching, emphasizing open principles where knowledge is treated as a public good. These resources have enabled widespread use in academic settings, empowering diverse communities to engage with geospatial technologies for research and skill-building.

Incubation Process and Retired Projects

The Open Source Geospatial Foundation (OSGeo) maintains a structured incubation process to evaluate and integrate promising open source geospatial projects into its ecosystem, ensuring they align with principles of openness, sustainability, and quality. Projects interested in joining as full OSGeo projects begin by completing the Incubator Application Questionnaire, which gathers details on the project's goals, licensing, community, and technical maturity, and submit it to the Incubation Committee via [email protected]. The committee, composed of experienced OSGeo members, reviews the application against initial evaluation criteria, including whether the project uses an OSI-approved license, is free of encumbrances, and supports geospatial functionalities. Upon acceptance into incubation, the assigns a mentor—often an OSGeo member or a project-recruited —to guide the initiative through a phase focused on rigorous assessment. This phase typically lasts 6 to 12 months but can vary based on the project's progress, involving periodic status reports using a standardized template to track advancements in code quality, community building, documentation completeness, and adherence to open development practices. The mentor and evaluate key areas such as the establishment of an active Project Steering (PSC), diverse contributor engagement, and, where relevant, compliance with Open Geospatial Consortium (OGC) standards to ensure interoperability. Graduation from incubation requires the project to satisfy the OSGeo Project Graduation Checklist, confirming sustainable , OSI-licensed code, robust documentation, and an engaged community capable of ongoing maintenance. The Incubation Committee chair then presents the project to the OSGeo for final approval, after which it achieves full OSGeo project status with enhanced visibility, , and community support. This process has enabled numerous projects to mature since OSGeo's founding in 2006, fostering a diverse portfolio of geospatial tools. OSGeo also handles retired or de-listed projects through a voluntary process where initiatives that no longer maintain sufficient activity or relevance are encouraged to archive themselves, preserving their contributions while freeing resources for active developments. The Incubation Committee oversees de-listing for incubated projects that fail to progress, ensuring graceful transitions such as code archiving and knowledge transfer. A notable example is Community MapBuilder, an early project that entered incubation in 2006 but was retired in 2008 due to declining community participation and overlapping functionalities with newer tools; its codebase was archived on for historical reference. This approach maintains the foundation's focus on vibrant, impactful projects without abrupt terminations. Since 2006, OSGeo has incubated over 50 projects through this lifecycle, with over 25 achieving graduation to full status as of 2025, including recent examples like pgRouting, which completed incubation in November 2024 after demonstrating strong community governance and routing capabilities for geospatial databases.

Events and Conferences

Flagship FOSS4G Conference

The Free and Open Source Software for Geospatial (FOSS4G) conference serves as the Open Source Geospatial Foundation's (OSGeo) primary annual global event, fostering collaboration among developers, users, educators, and policymakers in the open source geospatial domain. Launched in 2006 in , , it united communities around tools like and MapServer, marking the inaugural gathering under the FOSS4G banner shortly after OSGeo's founding. Since then, the conference has evolved into an annual tradition, rotating host cities worldwide to promote international participation while complementing regional variants that tailor content to local needs. The event's structure emphasizes practical and interactive elements, featuring keynote addresses by industry leaders, hands-on workshops for skill-building, technical presentations on software advancements, and dedicated networking sessions for . For instance, the 2017 Boston edition drew 1,141 participants from 48 countries, showcasing over 200 sessions that highlighted diverse applications of geospatial technologies. Core themes revolve around updates on OSGeo projects such as and , explorations of open standards like those from the Open Geospatial Consortium (OGC), and case studies illustrating real-world implementations in areas like and . In response to the , the 2021 conference shifted to a fully virtual format in , enabling broader global access, with hybrid models adopted in subsequent years to accommodate both in-person and remote attendees. For 2025, the flagship FOSS4G convened in , , from November 17 to 23 at , with workshops commencing on November 17, offering talks and community activities centered on advancing open geospatial innovation. Complementing this, FOSS4G Europe was held from July 14 to 20 in , , expecting approximately 600 in-person participants and 4,000 online attendees, featuring workshops, presentations, and discussions on open source geospatial tools with a spotlight on open standards and digital public infrastructure to enhance and sustainable data practices.

Regional and Specialized Events

The Open Source Geospatial Foundation (OSGeo) supports a network of regional FOSS4G conferences that adapt the flagship event format to local contexts, fostering geospatial innovation across continents. FOSS4G 2025 took place November 3–5 in , , attracting over 500 attendees from diverse sectors including government, industry, and academia, with sessions on open geospatial adoption and integration. These events complement the global FOSS4G by emphasizing region-specific challenges, such as European or North American federal geospatial standards. OSGeo also organizes code sprints as intensive collaborative sessions for developers to advance projects and standards. The 2024 OGC-OSGeo-ASF Sprint, hosted February 26–28 in , , focused on integrating open geospatial standards into software ecosystems, resulting in new application developments and enhanced community interoperability. Additionally, the OSGeo Community Sprint at Big Data from Space 2025 occurred September 29 to October 3 in , , targeting ecosystem advancements in geospatial processing. These sprints have consistently driven tangible project progress, such as improved software compatibility and bug resolutions. Specialized events and local chapter meetups provide targeted platforms for niche topics and grassroots engagement. For instance, FOSS4G:UK 2025 on October 1–2 in , , highlighted British geospatial applications, with over 180 attendees reflecting growing local interest. The OSGeo.JP Meetup in on September 6, 2025, co-organized with the OGC Japan Forum, explored GeoBIM and digital twins integration. Other examples include the Open Source Geospatial Slovenija #4 event on October 22–23, 2025, focusing on Slovenian initiatives. Collectively, these regional and specialized activities have led to significant outcomes, including accelerated project developments, enhanced networking among thousands of annual participants worldwide, and sustained growth in OSGeo's global , with attendance across events reaching into the thousands to promote inclusivity and innovation in open geospatial technologies.

Community and Outreach

Global Community Engagement

The Open Source Geospatial Foundation (OSGeo) fosters a global through a network of local chapters that support activities in specific regions, languages, and countries. These chapters, such as OSGeo US and OSGeo UK, facilitate localized , events, and collaboration among members. As of 2024, OSGeo maintains a growing number of such chapters worldwide, enabling tailored engagement that promotes open geospatial technologies in diverse contexts. Community interaction is supported by various digital tools, including mailing lists hosted on lists.osgeo.org, which serve as primary discussion platforms for projects, committees, and general topics. As of August 2024, these lists had approximately 34,696 unique subscribers, reflecting sustained participation. Additionally, the forum provides a modern, threaded discussion space for broader conversations, while Matrix-based chat rooms (bridged from legacy IRC channels) enable real-time collaboration and informal meetings. These tools collectively lower and encourage ongoing dialogue among contributors. OSGeo's activities emphasize hands-on involvement, including code sprints and hackathons that bring developers together for collaborative development, often held in conjunction with regional events to build project momentum. Translation efforts extend accessibility, with initiatives like OSGeoLive supporting multiple languages to reach non-English-speaking users. Diversity initiatives, such as the FOSS4G Grant Program, promote inclusivity by participation from underrepresented regions and groups, ensuring broader representation in community activities. Since its founding in 2006, OSGeo's community has evolved from a predominantly US-centric base, driven by early advocates in North American geospatial projects, to a truly international network with chapters and contributors spanning continents. This growth highlights a deliberate focus on underrepresented regions, including , , and , through targeted outreach and support for local leadership.

Educational and Inclusivity Programs

The Open Source Geospatial Foundation (OSGeo) supports educational outreach through its GeoForAll initiative, a of laboratories hosted in universities and institutions worldwide that promote the use of geospatial tools in and learning. These labs provide free course materials, tutorials, and resources focused on OSGeo software such as and , enabling educators to integrate open principles into curricula without cost barriers. GeoForAll collaborates with international organizations including the International Cartographic Association (ICA), International Society for Photogrammetry and (ISPRS), and UN-GGIM to expand access to geospatial education. To foster inclusivity, OSGeo enforces a comprehensive across its forums, events, and projects, prohibiting , , and disrespectful behavior while encouraging respectful collaboration. The Code of Conduct Committee oversees implementation and incident response, ensuring a safe environment for all participants. Additionally, the Women Chapter raises awareness of women's contributions to OSGeo projects and supports mentoring to encourage female participation in the geospatial community. OSGeo promotes diversity through its FOSS4G Travel Grant Programme, which provides scholarships covering conference fees, travel, and accommodations to underrepresented groups, including those from the Global South, to enhance event since its launch in 2017. Key programs include participation in (GSoC), where OSGeo mentored 9 student projects in 2025 focused on enhancing open source geospatial tools like pgRouting and ZOO-Project. These initiatives have significant impact, training users through GeoForAll labs and UN Committee challenges that develop materials for UN , particularly emphasizing accessibility in the Global South via processing tutorials. The OSGeo UN Committee has produced targeted training for UN staff on spirals of the UN Open GIS Initiative, supporting geospatial applications in developing regions.

Awards and Recognition

Sol Katz Award

The Sol Katz Award for Geospatial (GFOSS) is an annual recognition presented by the Open Source Geospatial Foundation (OSGeo) to individuals who have demonstrated exceptional leadership in advancing principles within the geospatial domain. Named in honor of Solomon "Sol" Katz (1947–1999), a pioneering figure in GFOSS, the award celebrates sustained contributions that embody the collaborative and accessible ethos of geospatial technologies. Sol Katz, born in and raised in New York, earned degrees in geology from and in computer science from the , following service in the U.S. Air Force. During his career at the U.S. , he developed , one of the earliest geographic information systems, along with tools like PC MOSS and utilities such as sdts2dem for handling public geospatial data formats. Katz's work emphasized free distribution of software and data, influencing early online communities through contributions to list servers, until his death from Non-Hodgkin's Lymphoma in 1999. The award's criteria focus on long-term leadership and impactful contributions that promote GFOSS ideals, such as fostering community collaboration, enhancing software , and driving in geospatial projects. Recipients are selected for their role in building and sustaining the ecosystem, often through foundational development or organizational efforts that extend beyond individual projects. The Sol Katz Award was first presented in 2005, shortly before OSGeo's formal founding in 2006, and has been awarded annually by the foundation since its inception. The inaugural recipient was Frank Warmerdam, a key founder of the foundation and lead developer of the GDAL/OGR library, recognizing his pivotal role in establishing geospatial infrastructure. Subsequent honorees have included other influential figures, such as Markus Neteler in 2006 for his work on and leadership in geospatial research, and Paul Ramsey in 2008 for advancing and standards. By 2024, the award had recognized 20 individuals, including Tom Kralidis for his leadership in the GeoPython community and development of tools like pygeoapi. As of November 2025, nominations for the 2025 award are closed, with the presentation scheduled during the FOSS4G 2025 conference in , . The nomination process is community-driven, with submissions sent to a dedicated OSGeo email address ([email protected]) by a mid-September deadline, providing evidence of the nominee's contributions. A selection , comprising past OSGeo board members and awardees, reviews nominations and chooses the recipient, ensuring alignment with the award's emphasis on leadership. The award is typically presented during the closing plenary of the annual FOSS4G conference, highlighting the recipient's achievements to the global community.

Innovation and Service Awards

The Open Source Geospatial Foundation (OSGeo) presented the Most Innovative Developer Award from 2015 to 2017 to honor individuals for their novel and sustained contributions to geospatial software, particularly innovative features and developments in key projects such as and . Sponsored primarily by GeoCat, with additional support from partners including WhereGroup, ReEarth, T-Kartor USA, Route4Me, and GIS Consult, the award encouraged emerging developers to participate actively in the OSGeo ecosystem by spotlighting technical advancements that advance geospatial innovation. Recipients included Thomas Bonfort in 2015 for his pivotal work on MapServer and , Even Rouault in 2016 for enhancements to GDAL/OGR, and Sara Safavi in 2017 for her geospatial development efforts.

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  122. https://www.bigdatafromspace2025.org/code-sprint
  123. https://www.astuntechnology.com/blog-and-news/foss4guk-2025-did-you-miss-out/
  124. https://www.ogc.org/event/ogc-japan-forum-x-osgeo-jp-meetup/
  125. https://www.osgeo.org/history/events-history/
  126. https://www.foss4gna.org/
  127. https://www.osgeo.org/community/welcome/
  128. https://www.osgeo.org/community/communications/
  129. https://www.osgeo.org/initiatives/
  130. https://www.osgeo.org/history/
  131. https://www.osgeo.org/resources/osgeo-code-of-conduct/
  132. https://wiki.osgeo.org/wiki/CodeOfConduct_Committee
  133. https://wiki.osgeo.org/wiki/Women_Chapter
  134. https://www.osgeo.org/initiatives/foss4g-travel-grant-program/
  135. https://wiki.osgeo.org/wiki/Google_Summer_of_Code_2025_Accepted
  136. https://www.osgeo.org/foundation-news/osgeo-un-committee-educational-challenge/
  137. https://isprs-archives.copernicus.org/articles/XLII-4-W14/49/2019/
  138. https://www.osgeo.org/community/awards/
  139. https://wiki.osgeo.org/wiki/Sol_Katz_Award
  140. https://www.osgeo.org/foundation-news/sol-katz-award-for-geospatial-free-and-open-source-software-call-for-nominations-2025/
  141. https://www.osgeo.org/foundation-news/thomas-bonfort-receives-foss4g-developer-award/
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