Hello, I am interested in using the terrain ruggedness index (as part of the SAGA install with QGIS), but would like to know which algorithm it is using and how one can interpret the output data. The equation I see more is the Riley one, but it would be useful with all these processes to know what algorith has been used (in a help section).
A quick search on Google shows there are several methods: http://gis4geomorphology.com/roughness-topographic-position/ Also, is roughness a completely separate concept from ruggedness - a query for the geomorphologists! Thanks Lester
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