The Journal for Geographic Information Science issue 1-2015 presents peer-reviewed papers presented at the Geo­informatics Forum (www.gi-forum.org), held in Salzburg from July 7-10, 2015. The annual GI_Forum symposium provides a platform for dialogue among geospatial minds in an ongoing effort to support the creation of an informed GISociety.In this issue, the following topics are addressed:. GIScience Contributions for Society. Learning with Geoinformation. Earth Observation for Humanitarian Operations. GI for Public Health. Technical and Human Sensors. Transportation Modelling. Environmental GIS and Applications