[GRASSLIST:8278] Re: masking a portion of a raster layer "by hand"

[Maciek Sieczka]

possibilities:
- QGIS Grass digit plugin to digitise your mask polygon, v.to.rast
- v.digit, v.to.rast
- r.digit

From: "Jason Horn" <jhorn at bu.edu>


> Does anyone know of a way to create a mask for a raster layer using  
> the mouse?  I'd like to mask off areas of interest in raster layers  
> that are determined by visual observation.