Method of detecting man-made structures in a digital elevation map

摘要

The method involves forming a digital image from the representation of the terrain. On the basis of this image, isolines such as contours are determined. These isolines are filtered using a size criterion, and the extreme values provided by them are calculated. From the resulting information regions on interest on the terrain are located. The process includes a stage of calculating the total length of crest lines contained within the extreme isoline pattern, and comparing by filtering the length of these lines with a threshold value. Regions of interest are thus delimited on the representation of the terrain.