Spatial objects classification algorithm on the basis of topological features of a form

The algorithm for automatic classification of spatial objects on the basis of information about the form of these objects is presented in article. Topological characteristics of a contour of an object are calculated for the performing of an task. Topological features are based on methods of computer topology and Bettie's numbers. The feature set for each contour is compared with the existing standards and this object belongs to one of classes. Examples of use of the program for automatic typology of buildings in municipal GIS are shown.