WebGIS, as it is considered in this paper, should provide functions for displaying and navigation
trough maps, so as functions for querying of geographic data using both spatial and non-spatial
criteria. It is obvious that these functions can cover only some of a GIS functionality stated in
(Soomro et al., 1999). For capturing, storing and manipulating with geospatial data we still need more
traditional application environments. Sharing of geospatial data for Web presentation purposes can be
done by extending of existing traditional GISs with a set of “Web interfaces”. In order to build model
of a WebGIS that is open for connecting to a range of different geodata sources we need commonly
acceptable standards for realization of these Web interfaces. Open Geospatial Consortium (OGC)
(Open Geospatial Consortium Inc., 2004) interface specifications for building Web services that
enable retrieval of custom maps (Web Map Service Implementation Specification, 2002) and
querying of geospatial entities (Web Feature Service Implementation Specification, 2002) seems as a
quite reasonable choice