[Qgis-user] Help with polygon

[Nicolas Cadieux]

Hi,
If you don't have it,  I would download the SRTMGL1 
(https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table/srtmgl1_v003) 
for the region.  I would use the raster math to Identify pixels lower 
than the plateau.  Then, you could do a raster to vector conversion.

The other option (probably easier) is to do contour lines from the 
SRTMGL1 (raster/extraction/contour line).  Then you could select the 
contours and work with that.
Good Luck
Nicolas

Le 2016-02-16 10:44, Mariana Buzzi-2 [via OSGeo.org] a écrit :
> t of landscape, the plateau





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