The Geodatenzentrum (GDZ) is the distribution platform of BKG, Germany's federal mapping and geodesy agency. It provides authoritative national products such as the administrative areas dataset (VG250/VG1000), digital topographic and landscape models, geographic names, and elevation data.
Many BKG datasets are available as open data under the GeoNutzV regulation, free to use including commercially, while some remain licensed. The GDZ is the reference source for consistent, nationwide German base layers — particularly administrative boundaries used for joining statistical data.