[gdal-dev] Terrain Analysis

[Scott]

You can also create a .vrt of your raster(s) and embed python (or C) to 
do the analysis. Any pip package you can find to do analysis can be 
used. VRT also allows for JIT compiling. See the VRT docs for details:

https://gdal.org/drivers/raster/vrt.html

On 2/21/23 08:38, 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 
> <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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