OpenStreetMap (OSM) is a collaborative project to create a free editable map of the world. Luxembourg's official orthoimagery and maps can be used to improve OpenStreetMap. By combining open information from imagery, actual and historical maps, and their own local knowledge, mappers can create the…

OpenRailwayMap (previously called "Bahnkarte") is a detailed online map of the world's railway infrastructure, built on OpenStreetMap data. It has been available since mid-2013 at openrailwaymap.org.