[GRASS-user] newbie question - vector/raster processing

[Jose Gomez-Dans]

On 10/16/07, andrew haywood <ahaywood3 at gmail.com> wrote:
>
> I have then imported the classified vector file into grass. I now would
> like to populate the forest class by intersected the polygons in my new
> vector map with an existing forest class map and take the most common forest
> type from the old map. I was thinking i could rasterise the old forest class
> map and some how count the number of cells for each class within each
> polygon and some how choose the most common class.
>

This is probably of some help <
http://grass.gdf-hannover.de/wiki/Aggregate_Values>. r.statistics might be
useful, but the wiki entry gives you quite a thorough description. IMHO, it
is far harder than it should be. starspan might also be an option.

Regards,
Jose
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