vector polygons

martijn at martijn at
Fri Jul 15 04:50:45 EDT 1994

On Thu, 14 Jul 1994, motte wrote:

> Rica Saporta writes:
> > 
> > i was wandering is there a way to convert a vector polygon drawn by the user
> > on a "background" raster layer into a binary (1 on the inside, 0 on the outside)
> > layer of its own?
> > 
> Grass 4.1 has the command r.digit for this. And tiggers ARE wonderful things.
> Philip Verhagen

To which I should add, that Grasses v.digit module also has an option for 
displaying a background cell map during digitizing. You must label your 
polygons "1" yourself, however - this is not done automatically.

P. Martijn van Leusen
Institute of Prehistory, University of Amsterdam   martijn at

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