Map all geographic locations to a well-known catalog

Created by: jakobdeller

The Wasser-DE portal uses its own list of REGION_IDs which is not particularly helpful in the long run. I would like to map the names given in REGION_NAMES to an established catalog, like www.geonames.org as suggested by DCAT-AP (https://www.dcat-ap.de/def/dcatde/2.0/implRules/#angaben-zur-geografischen-abdeckung)