Terrain objects, their dynamics and their monitoring by the integration of GIS and Remote Sensing.

Geometrical and thematic data on terrain objects stored in a geographical information system (GIS) can be kept up-to-date using remote sensing data. Geometrical and thematic data can be extracted from remote sensing data by segmentation and classification techniques respectively. New segmentation techniques have been developed by combining edge detection techniques in combination with fixed geometrical data already present in the GIS used. For the Flevoland test site in the Netherlands the methodology was tested. The crop classification was performed using the field boundaries in an object-based approach. For the agricultural area under consideration accurate results were obtained.