Rockfall hazard: a geomorphologic application of neighbourhood analysis with ILWIS

Enschede

1990

S. 40-44

BandaufführungSonderdruck

185641

As a test for the implementation of neighbourhood analysis functions within ILWIS, a program was developed dealing with neighbourhood analysis vor one specific problem: the calculation ot the velocities of rolling blocks from rockfall-producing slopes. The pixels with maximum height differences within calculation windows were selected from a DTM and data from the same locations in other maps were used to caluculate the velocity in a number of iterations. The program can be used for rockfall hazard mapping on general scales.