[GRASS-user] min and max raster within polygons

[Anna Petrášová]

On Sun, Nov 20, 2016 at 3:12 PM, Dave Roberts <droberts at montana.edu> wrote:
> Friends,
>
>    I have succeeded (finally) in heads-up digitizing the mountain ranges of
> the Rocky Mountains.  Now I want to know the minimum and maximum elevation
> for each range.  I have a suitable DEM, but I cannot figure out a
> combination or r.mapcalc or other that will give me this.

I would probably use r.univar with zones option. You have to first
rasterize your vector of ranges.

https://grass.osgeo.org/grass73/manuals/r.univar.html

Anna

>
>    Clearly, what I want is to query a raster within a boundary, not at a
> point.
>
> Thanks, Dave
> --
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