About FOSS4G
FOSS4G is an acronym for Free and Open Source Software for Geospatial, and it represents the world's largest international conference organized by OSGeo, a non-profit organization dedicated to promoting open-source GIS. This conference, held in various locations around the world, attracts around 1,000 participants annually and has evolved into the flagship event representing the geospatial community.
FOSS4G 2026 Comes to Hiroshima
In 2026, FOSS4G will be held in Hiroshima, Japan. In this city that symbolizes peace, advocates of "free and open" geospatial information from around the world will gather. Let us expand the possibilities of open-source GIS together here in Hiroshima.
Convergence of All Geospatial Knowledge
FOSS4G covers a wide range of topics including:
- Open-source GIS software development
- Geospatial tool use cases and applications
- Application development
- Earth observation data utilization
- Cutting-edge education and research
- Open data provision and operations
It serves as a platform where participants with diverse expertise and backgrounds learn from each other and share the latest insights.
Open to Everyone
FOSS4G is an event for everyone interested in maps. We welcome not only developers who write code, but also GIS users, decision-makers, researchers, students, and even beginners who are "just a little curious".
Around 1,000 people participate in FOSS4G each year, and this community continues to grow. Whether you are a geospatial information professional or attending for the first time, as long as you have an "open mind", FOSS4G is your place.
See You at FOSS4G Hiroshima 2026!
Let us create the future of free and open geospatial together. We look forward to welcoming you in Hiroshima.
FOSS4G 2025 Japan