Auswertesysteme SIS is a research project with the goal to unify data frommultiple sources and convert them to the Swiss Federal Roads Authority (FEDRO) RBBS system. It is a GIS project implemented in WPF which is using complex spatial queries in order to map infrastructure objects from various geospatial systems and many different input source types including databases, xml, interlis, etc. Mapping is implemented with extensive use of MS SQL server spatial extensions and predefined system specific rules. Data access layer is implemented as a mixture of MS Entity Framework and MS ADO .NET for optimal combination of speed and performance. Application is implemented for BisConsult GmbH in cooperation with IMC GmbH from Zurich, Switzerland.