[GRASS-user] Gathering all layers, defining subset

[Rich Shepard]

On Mon, 21 Dec 2009, Hamish wrote:

> maybe one of these in a loop,
>
> http://grass.osgeo.org/wiki/Streams_extraction_from_streams_map
> http://grass.osgeo.org/wiki/GRASS_AddOns#r.stream.extract

> then 'g.region vect=extracted_stream' + a second g.region call to align
> the resolution with the raster map of interest.

Hamish,

   Perhaps. I'll try the vector one. I didn't see these when I looked through
the Wiki.

   I'd still like to learn why v.extract failed. Does it work only on
polygons and not lines?

Thanks,

Rich