Visit the website: http://2017.foss4g.org/
The annual FOSS4G conference is the largest global gathering focused on open source geospatial software. FOSS4G brings together developers, users, decision-makers and observers from a broad spectrum of organizations and fields of operation. Through six days of workshops, presentations, discussions, and cooperation, FOSS4G participants create effective and relevant geospatial products, standards, and protocols.
The Open Source Geospatial Foundation was founded to support and build the highest-quality open source geospatial software. The foundation's goal is to encourage the use and collaborative development of community-led projects, data development and education. Many projects live under the OSGeo umbrella. http://osgeo.org