Wybór parametrów przy automatycznym tworzeniu numerycznego modelu rzeźby terenu z wykorzystaniem zdjęć lotniczych

The article reviews ways to select correct parameter set for automatic construction of regular DEM using the VLL (Vertical Line Locus) based on the correlation algorithm of matching stereo pair point identification. The following parameters impacting a number of successfully correlated points and accuracy of DEM construction are considered: a threshold value o f correlation coefficient, a search window size, a grid spacing. The aerial image stereo pairs for rural areas with different landscape types were studied using software developed by authors. The empirical results are included in the article.