[GRASS-user] Resample DEM to larger cells

Stefan Blumentrath Stefan.Blumentrath at nina.no
Wed Sep 25 12:37:40 PDT 2019

Hi Rich,

Please have a look at:

With g.search.modules (https://grass.osgeo.org/grass76/manuals/g.search.modules.html) you can search for modules using keywords.

Also https://grass.osgeo.org/grass76/manuals/rasterintro.html has a section on resampling and you can get a brief overview over available options on: https://grass.osgeo.org/grass76/manuals/raster.html


-----Original Message-----
From: grass-user <grass-user-bounces at lists.osgeo.org> On Behalf Of Rich Shepard
Sent: onsdag 25. september 2019 21:26
To: grass-user at lists.osgeo.org
Subject: [GRASS-user] Resample DEM to larger cells

I have a DEM built with 68 raster maps (attached) developed from LiDAR (1m) data and reprojected using lanczos_f (which might have been a poorer choice for this type of raster, but I wasn't aware of this at the time). There's still a source map missing (I've contacted the source about this) but I want to resample the maps to 5m x 5m cell size. I think that would eliminate some of the sharp discrepancies in the assembled map.

There are five or six flavors of r.resample and I would appreciate advice on which would be most appropriate for me to use on these data. I don't know enough about the underlying algorithms to make an intelligent choice.



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