Gis and Uncertainty Management

The contribution deals with issues that are very closely connected: Web services model, Dynamic GIS and the problem of uncertainty of spatial data and discusses the possibilities of the context use as a reflection of the system of understanding. The problem of the relation to the decision support system is addressed and GIS as a tool dealing with all phases of knowledge structure. GIS Web services architecture makes GIS more open and interoperable in using and offers wide range of context information. Web has a unique ability to integrate diverse data through shared location and GIS Web services offer real potential for meeting the demands of users. On one hand the use of very heterogeneous data available on Web – multi-sensor, multi-band and others in the combination with multi-criteria conditions evaluation causes increasing of uncertainty we meet in the processes and consequently in results. The paper discuss the problem of wide context (temporal, spatial, local, objective, attribute oriented, relation oriented) as a tool to compensate and to decrease the uncertainty of data, classification and analytical process at all process to increase the information value of decision support.