This book contains the extended abstracts of all contributions presented during the Open Source Geospatial Research and Education Symposium (OGRS 2012) held in Yverdon-les-Bains, Switzerland, October 24-26, 2012. OGRS is a forum for the exchange of knowledge, new solutions, methods, practices, ideas and trends in the domain of geospatial information through the development and use of geospatial free and open source software (GFOSS) in both research and education. The open source approach has many positive impacts; this is what OGRS wants to demonstrate in the context of geospatial research and education. In this regard, these proceedings cover numerous research and educational topics, with education constituting a new field of interest for OGRS.