[GRASS-user] calculate pixel areas with starspan

[Dylan Beaudette]

On Sunday 19 November 2006 21:53, maning sambale wrote:
> Hi,
>
> I have grass rasters and I want to calculate raster classes based on
> the attributes of a shapefile.  I'm experimenting with starspan and so
> far its extremely fast than:
>
> v.in.ogr #to export shapefile
> v.build and v.digit #to check for topology problems
> v.to.rast
> r.report
>
> But, how can I get area coverage (in percent and hectares) from a
> given raster class in a polygon?
>
> Any ideas?
>
> Cheers,
>
> Maning

Hi Manning, 

How are you invoking starspan, and what exactly do you mean by "an area 
coverage" ?

You might check out the "mini-raster" options in starspan:
--mini_rasters <prefix> 
--mini_raster_strip <filename> 

I believe that these will extract "mini" rasters for each vector feature. Be 
sure to read the documentation however.

Cheers,


-- 
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341