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The Geological Survey of Bavaria intends to produce a countrywide hydrogeological map in the scale 1 : 50,000 until 2015. The spatial data will be seamfree, reflect the 3D-character of hydrogeological maps and comprehensive search functions will be available for the whole dataset. A spatial database was designed, which reflects the complex relations of rock and groundwater bodies. The underlying relational data model integrates the following main object types: propagation of the upper aquifers and surface layers, rock bodies, structural surfaces together with point data and fault lines, groundwater bodies as well as groundwater surfaces together with point data and the distribution of different types of groundwater potential. The database was developed as an ArcGIS-extension using the Geodatabase as a relational database. The system supports the mapping process and provides consistent data structures. All data will be uploaded into the Bavarian Geoscience Information System, where the hydrogeological spatial data will be available for users in a searchable format.
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