In diploma thesis we presented the creation of application for the Tablet PC, which allows us the technical support for decisions support in cadastral field operation. The functionality of the application has been tested in the field case study and we got positive response results, but some weaknesses has also appeared. In the thesis, there are (in details) described programmes Geo PRO and QGIS and the process of making the application and particulary the results of its use on the field. The information system (GIS) and its mobil use and the Tablet PC is also presented. Finally, there are presented the possibilities to use selected layers .