[GRASS-user] Export specific shapes from a vector file

[leonidas]

Thank you Niko,
well I understand the first one (using v.extract).
-Is it possible to do something like that using v.out.ogr and export to
shapefile?
-As far as concerns the second question using v.to.rast, how can I export
only specific areas using sql where clause or list for specific categories?
Thanks again, Leonidas

Nikos Alexandris wrote:
> 
> On Mon, 2009-02-16 at 12:55 -0800, leonidas wrote:
>> I need to export specific shapes from a grass vector file to another
>> grass
>> vector file.
> 
> v.extract in=VectorMap out=ExtractedFeatures ...
> # you can use "list=" to extract specific categories (the "cat" column)
> # or an SQL where clause, e.g. something like
> "where='SomeColumn="SomeString"'
> 
>> Also, I need to convert specific polygons from a vector grass file to a
>> raster grass file.
> 
> I assume by polygons you mean areas.
> 
> v.to.rast in=VectorMap out=RasterMap type=area ...
> # "use=???" You need to decide which values you will assign to your
> pixels.
> 
>> How can I do that?
>> Thanks, Leonidas
> 
> Regards, Nikos
> 
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