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The main characteristics of geographic information systems (GIS) are large geospatial datasets and the necessity to share data among other GIS systems. In order to achieve this kind of interoperability it is necessary that the data is st ructured, encoded and described in standardized way and that the GIS architecture is based on standards. Standards in this field are based on the se rvice-oriented architect ure, where different types of tasks are implemented by different services. All these ta sks in collaboratio...