GEOportal.NRW is the central point connecting users and providers of geodata in North Rhine-Westphalia, the most populous German state. It enables search and visualisation of geobasis and thematic data from the state administration, including the cadastre, topographic maps, aerial imagery, and noise maps.
Geobasis NRW provides its base geodata services free of charge for any use through OGC standards (WMS, WMTS, WFS, WCS), and the portal links to many municipal and district portals. It is the authoritative regional source for NRW base mapping.