FOSSGIS e.V. is an incorporated non-profit association and the OSGeo Local Chapter of the German language community. FOSSGIS e.V. represents D-A-CH. D-A-CH is an acronym for Deutschland (Germany), Österreich (Austria) and Schweiz (Switzerland), where german is an offical language. FOSSGIS e. V. is also the German language local chapter for OpenStreetMap (OSM)
FOSSGIS e.V. organizes the annual FOSSGIS Conference which is similar to the FOSS4G conference with about 400 participants (https://fossgis-konferenz.de/)