Extending Geographic Data Modeling by Adopting Constraint Decision Table to Specify Spatial Integrity Constraints

The rapidly growing use of geospatial data creates a great demand for a standard based GIS data model which also includes quality issues. Especially when datasets are shared for different purposes, the quality information becomes important and must be available to the data users. This paper proposes a method to extend geographic data modeling which allows for the consideration of quality information in a standardized way. In more detail it is shown how Constraint Decision Table (CDT) can be used to include spatial integrity constraints in the model. The information of the data model will conduct the following activities in GIS, especially during the data capture process, thus we also focus on integrating the quality information within the data capture workflow. For the integration we use OGC web services and discuss how they can be extended to provide the mobile GIS clients with these information.