[gdal-dev] Terrain Analysis

[Laurențiu Nicola]

Hi,

For the first three you can look into gdaldem (https://linux.die.net/man/1/gdaldem).

Regards,
Laurentiu

On Tue, Feb 21, 2023, at 18:38, Roa Carvajal, Camila via gdal-dev wrote:
> Hi, 
> 
> Recently I used gdaldem to compute slope and aspect from a Digital Elevation Model. In the past I've used SAGA GIS to compute a more extensive list of terrain parameters but it uses a large amount of memory for heavy raster files. So I'm looking for a program (or scripts) that does the computation with GDAL or an associated project. So far I found some of the computations are implemented in Grass Gis.
> 
> I would appreciate any information you can provide.
> 
> This is the list of terrain parameters that SAGA computes (https://saga-gis.sourceforge.io/saga_tool_doc/2.1.3/ta_compound_0.html):
> 
> 
>  • Analytical Hillshading
>  • Slope
>  • Aspect
>  • Plan Curvature
>  • Profile Curvature
>  • Convergence Index
>  • Closed Depressions
>  • Catchment Area
>  • Topographic Wetness Index
>  • LS-Factor
>  • Channel Network Base Level
>  • Channel Network Distance
>  • Valley Depth
>  • Relative Slope Position
> Thanks,
> 
> Camila Roa
> Graduate Research Assistant @ GCLab
> University of Tennessee
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