The wheelmap is based on geodata from OpenStreetMap (OSM). OpenStreetMap is a free worldwide map, created by people like you. It's like Wikipedia for maps. To be able to edit places or to create new ones you need an OpenStreetMap account and must to be logged in with it.
With your knowledge about wheelchair accessible places you help people with physical impairments to better organize their everyday live. Furthermore the OpenStreetMap gets considerably richer in detail.
Thank you very much for your support!