Based in Hamburg, Germany. CEO of a small company for digital, web-based urban planning solutions (Stadtkreation). Urban planner (studied) and web developer (self-educated) since 2003/2004. Specialized in interactive and often map-based web solutions for planning projects. Evolving GI scientist (UNIGIS MSc studies in Salzburg, Austria), especially interested in the broad field of Open Source GIS solutions and Open Data. GIS SE contributions mainly for QGIS, QGIS Graphical Modeler, QGIS Expressions, and OpenStreetMap/Overpass API.