Abstract

The problems related to geometrical correctness of maps gathered and stored by the geographic information system (GIS) computer systems are still present nowadays. Firstly, digitization of traditional paper maps is still in progress all over the world (the maps are being converted to a vector form and stored in relational databases). Secondly, the existing digital maps are being constantly updated with use of manual and partially automated methods. The following article presents a system, developed in order to detect and correct topological errors of surface objects. The method of operating on virtual objects in computer aided design (CAD) software environment is suggested. The main advantage of this solution is its applicability in verification of topological errors in spatial databases that contain large numbers of objects.

Key words: Cadastre, geographic information system (GIS), land parcel identification system (LPIS), topology, computer aided design (CAD), software, spatial data.