Re: [Qgis-user] Terrain Ruggedness Index Calculation

2017-07-24 Thread Falk Huettmann
Hi there, very good question indeed. I have no direct answer but three more points to add: -in virtually any GIS and software computations, SLOPE, ASPECT, IDW, KRIGGING etc. one will find such type of questions, and many answers and solutions. None of them are very clear and often not precise.

[Qgis-user] Terrain Ruggedness Index Calculation

2017-07-24 Thread Mark Polczynski
I have read Riley, S. J., S. D. DeGloria and R. Elliot (1999). A terrain ruggedness index that quantifies topographic heterogeneity, Intermountain Journal of Sciences, vol. 5, No. 1-4,1999, but might someone be able to tell me how the "Ruggedness Index" calculation is performed in QGIS? In particu

[Qgis-user] Terrain ruggedness Index

2015-09-21 Thread Lester Anderson
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 wha