Maué, PatrickAuer, SörenBizer, ChristianMüller, ClaudiaZhdanova, Anna V.2019-05-152019-05-152007978-3-88579-207-9https://dl.gi.de/handle/20.500.12116/22409Retrieval of web-based geographic information (GI) for spatial decision- making processes can benefit from emerging semantic technologies. Ontology-supported metadata, collaboratively created by a social network of spatially-aware users, ensures efficient and precise discovery of maps published with the help of catalogs. The creation and maintenance of the metadata is driven by two forces: on the one hand experienced catalogers who ensure consistency and quality, on the other hand catalog users who continuously adapt and extend the metadata. We discuss the requirements for a catalog for GI which is able to capture the semantics emerging within a community and apply the results to the registered metadata.enText/Conference Paper1617-5468