[GRASSLIST:9913] Re: ps.map multiple rasters??

[Francesco Mirabella]

Ok Hamish,
thanks for your suggestion, I will try to see what I can manage to do
with r.mapcalc

cheers
Francesco

On Thu, Jan 19, 2006 at 03:18:41PM +1300, Hamish wrote:
> >>>> I wonder if there is a way of inserting more than one raster into a
> >>>> map made with ps.map. This is possible with vectors, is it possible
> >>>> with rasters?? how??
> > ..
> >>> For each ps.map run, only one raster map layer (or set of layers or
> >>> imagery group; see below) can be requested. ...
> >>> 
> >>> r.patch could help
> ..
> >> also you could make a ps.map Encapsulated PostScript output map, then
> >> place the EPS file(s) within another ps.map container map. Possibly 
> >> even a (mostly) blank one if say you want 4 maps arranged as so:
> ..
> > thanks for your replay, I will try. In fact r.patch works fine if the
> > maps are of the same type, otherwise the reconstruction of the color
> > map can make bad results..
> 
> the eps within another ps.map is useful if the regions will be different
> (e.g. overview map + detail map at different places on the page).
> 
> If you are interested in just overlaying maps in both the same region &
> place on the page, it is best to just use r.patch for maps of the same
> color maps, or as Glynn explained to me on the mailing lists a few
> months ago, use r.mapcalc to create red,green,blue maps using the "#"
> operator combined with if() statements to provide the order (see the
> r.mapcalc help page). My less efficient method was to export a PNG dump
> of the display monitor, then reload that image into GRASS as a new
> raster.
> 
> 
> 
> Hamish