Stefan Werder

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Constraints are inherent in most spatial datasets. However, they are often not defined explicitly and therefore cannot be enforced. This leads to the need for an explicit formalization of spatial constraints. In order to identify the diverse formalization requirements, previous research on constraint classification and usage in both data integration and(More)
In recent times the amount of spatial data being collected by voluntary users, e.g. as part of the OpenStreetMap project, is rapidly increasing. Due to the fact, that everyone can participate in this social collaboration, the completeness and accuracy of the data is very heterogeneous. Although a object catalogue exists as part of the OSM project, users are(More)
Im Katastrophenmanagement ist es notwendig, Informationen aus Freitextmeldungen zeitnah in eine Lagekarte zu übertragen. Die angestrebte Automatisierung des Prozesses basiert auf verschiedenen Ergebnissen wehrtechnischer Forschung. Ausgehend von einem bestehenden Datenmodell wurde die Wissensbasis, entsprechend der domänenspezifischen Anforderungen des(More)
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