[GRASS-user] How can I find average/maximum raster values within
a vector area?
george.mackerron06 at ic.ac.uk
Thu Aug 2 05:21:45 EDT 2007
Many thanks to you both.
v.rast.stats looks perfect -- it's churning away as I write...
On 2 Aug 2007, at 09:52, Daniel McInerney wrote:
> you could also use v.rast.stats to compute
> pollution statistics for the administrative
> areas. See  for more details.
>  http://grass.itc.it/gdp/html_grass63/v.rast.stats.html
> Moritz Lennert wrote:
>> On 02/08/07 06:59, David Finlayson wrote:
>>> Forgot to CC grass list
>>> On 8/1/07, David Finlayson <dfinlayson at usgs.gov> wrote:
>>>> I think you want the command r.statistics. You will need to convert
>>>> your administrative areas vector map into a raster map where
>>>> each area
>>>> has a unique ID. Then run r.statistics on the pollution map
>>>> using the
>>>> administrative areas raster as the cover. This tool builds a
>>>> table with the min,max avg, etc statistics of pollution for each
>> How difficult would it be to create a module 'v.statistics' which
>> would skip the step of converting the cover to raster ?
>> grassuser mailing list
>> grassuser at grass.itc.it
George MacKerron / 020 7870 7509
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