[GRASS-dev] ps3.map: join two rasters

[E. Jorge Tizado]

Thanks to all

Before I send any code to grass servers I ask how. At the moment this is a 
subdir of ps/ and the only change in grass standard files is the Makefile of 
the ps/ subdir adding ps3.map to SUBDIRS list.

I prefer rename this module as ps3.map because I try update poscript code 
(many responsabilities has the ps code now) to level 3 (I have in mind 
smoothing gradientes and this is only in PS3).

It is interesting the posibility of gradient legend in CELL map; it is easy to 
program, I try it. The actual legend with gradient look as 
ps_map_legend_float.jpg.

But the better improve (just run without problems) is merge two raster maps as 
shown in ps3_map_raster.jpg (this was the mother of all changes :). Of course 
without any cost in size of ps file, this work directly on the original 
raster image, thus no more bytes of size to the file (option of second map is 
color o gradient of one color -gray, blue, ....).

-- 
E. Jorge Tizado
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