[gdal-dev] how to combine overlapping rasters?

[Brian Case]

Etienne

you can gdal_rasterise the polys into a alpha band, then add your alpha
band to your image in a vrt.

Brian


On Tue, 2011-12-06 at 19:59 -0200, Etienne Tourigny wrote:
> 
> A related question: How can I effectively mask (mark as nodata) raster
> pixels inside a polygon?  For example, I would like to set the pixels
> of the South American map to nodata inside the political boundaries of
> Brazil, from a shapefile.