In 2021, the data base comprised approx. 12,000 geographical names from the coastal zone of the North Sea and the Baltic Sea, originating from approx. 200 sources, including the maps “Geographische Namen in den deutschen Küstengewässern” (Geographical Names in German Coastal Waters) published by the Standing Committee for Geographical Names (StAGN), and nautical charts of the Federal Maritime and Hydrographic Agency from different years.
In the coastal zone, channel systems and tidal flat ridges change their size, shape, and location as a result of morphodynamics. Thus, geometries for geographic objects are recorded at different times in the Coastal Gazetteer. Likewise, their designations are documented in the different local languages. In addition to individual historical surveys there are an overall records of the North Sea and Baltic Sea coasts for the current state and the year 1975.