[GRASS-user] Upscaling an elevation model

[Helmut Kudrnovsky]

NikosAlexandris wrote
> Dear "elevation" experts,
> 
> I am looking for ways to upscale a 5m resolution elevation model.  The
> upscaled models will be subjected to a series of trials using
> `r.watershed`.  Derivative products will be inputs for soil erosion
> modelling.
> 
> In our wiki page about Interpolation [0], `r.resamp.stats` [1] is
> presented as the only tool to resample a raster map to a coarser grid.
> However, `r.resamp.rst` [2] also performs resampling to a lower
> resolution.
> 
> [0] https://grasswiki.osgeo.org/wiki/Interpolation
> [1] https://grass.osgeo.org/grass76/manuals/r.resamp.stats.html
> [2] https://grass.osgeo.org/grass76/manuals/r.resamp.rst.html
> 
> While the target is to somewhat maintain "geomorphometric consistency"
> across the different (coarser) scales, which tool is recommended?
> For `r.resamp.stats`, would you recommend a resampling method other than
> 'average'?
> 
> Thank you, Nikos
> _______________________________________________
> grass-user mailing list

> grass-user at .osgeo

> https://lists.osgeo.org/mailman/listinfo/grass-user

you can see 

https://grass.osgeo.org/grass74/manuals/addons/r.valley.bottom.html

"[....]The MRVBF index assesses the flatness and lowness of terrain over
multiple scales and DEM resolutions[...]"

how it's there.



-----
best regards
Helmut
--
Sent from: http://osgeo-org.1560.x6.nabble.com/Grass-Users-f3884509.html