Topographic correction (for land use classification) with SAGA or GRASS

Question

Is there a module in GRASS or SAGA (or a alternative open program) to do a topographic correction of a landsat image to enhance the land use classification?

Thanks! Martin

Answer 1

For SAGA:

Module Name
Topographic Correction
Menu Terrain Analysis > Lighting

Note that you can always search for a module by right clicking "module library"in the workspace tab.

Answer 2

Not really a direct answer, but I can't make comments. I haven't used any of the tools on the page but have you had a look at the GRASS image processing page? It lists GRASS tools for classification and image correction.

Answer 3

In GRASS, use i.topo.corr. See http://grass.osgeo.org/wiki/Image_processing#Correction_for_topographic.2Fterrain_effects