[GRASS-dev] ps.map: raster always under vector map?

[Markus Neteler]

On Mon, Apr 30, 2007 at 07:55:47PM +1200, Hamish wrote:
> Glynn:
> > Bear in mind that the raster map is always opaque, so it will obscure
> > anything which is drawn beneath it.
> 
> Markus:
> > That's exactly what I need: in my case the raster map contains a few
> > cells only, but I need it on top to not be covered by vector contour
> > lines etc.
> ..
> > Maybe ps.map's raster command needs an additional parameter "ontop" or
> > something like this? Hacking C code as Hamish suggests might be asked
> > too much for the average user.
> 
> 
> are the null areas solid white, not transparent?

They are transparent. All fine. Just that the tons of contour
lines cover the scarse raster areas in the raster maps. That's
why I need them on top of the dense contour lines.

 
> Glynn:
> >  Level 3 PostScript supports masked
> > images, but ps.map doesn't make use of this.
> 
> has anyone ever used the vector masking flag in ps.map?
> maybe something interesting in there.

/me digs into the manual

Markus