[GRASS-user] Adding a semi-transparent layer

[José Antonio Ruiz Arias]

Thanks, Len.

Usually is very interesting to know that there's more than one way to do
something. I will have in mind your approach.

Cheers
________________________________
 
José A. Ruiz Arias
Departamento de Física
Escuela Politécnica Superior
Edificio A-3, Campus Lagunillas
Universidad de Jaén
23071 Jaén Spain
Tlf. +34 953212474
Email:  jararias at ujaen.es
_____________________________________

> -----Mensaje original-----
> De: Len Coop [mailto:coopl at science.oregonstate.edu]
> Enviado el: jueves, 22 de marzo de 2007 19:35
> Para: José Antonio Ruiz Arias
> Asunto: Re: [GRASS-user] Adding a semi-transparent layer
> 
> Jose,
> Now that you have a solution I send you a very simple one using ppmmix:
> 
> #!/bin/sh
> # example use of ppmmix - blend climate data layer (based on humidity)
> with shade relief
> main=SNC_V2
> sublayer=dem90m.nw.sh.bal
> opacity=0.65
> r.out.ppm $main
> r.out.ppm $sublayer
> /usr/bin/ppmmix $opacity $main.ppm $sublayer.ppm | pnmtopng >
> $main.mix.png
> 
> orig layer is at http://pnwpest.org/snc/SNC_V2.png
> blended layer is at http://pnwpest.org/snc/SNC_V2.mix.png
> 
> Cheers,
> Len
> 
> José Antonio Ruiz Arias wrote:
> > Seems to work fine. Thanks a lot Glynn. ;)
> >
> > ________________________________
> >
> > José A. Ruiz Arias
> > Departamento de Física
> > Escuela Politécnica Superior
> > Edificio A-3, Campus Lagunillas
> > Universidad de Jaén
> > 23071 Jaén Spain
> > Tlf. +34 953212474
> > Email:  jararias at ujaen.es
> > _____________________________________
> >
> >> -----Mensaje original-----
> >> De: Glynn Clements [mailto:glynn at gclements.plus.com]
> >> Enviado el: jueves, 22 de marzo de 2007 15:19
> >> Para: José Antonio Ruiz Arias
> >> CC: grassuser at grass.itc.it
> >> Asunto: RE: [GRASS-user] Adding a semi-transparent layer
> >>
> >>
> >> José Antonio Ruiz Arias wrote:
> >>
> >>> I've been trying to create the PPM/PGM pair with the PNG driver. Using
> >> the next commands I get the ppm file:
> >>> export GRASS_TRUECOLOR="TRUE"
> >>> export GRASS_WIDTH=642
> >>> export GRASS_WIDTH=371
> >>> export GRASS_PNGFILE=mde.ppm
> >>>
> >>> d.mon start=PNG
> >>> d.mon select=PNG
> >>> d.rast map=mde
> >>> d.mon stop=PNG
> >>>
> >>>
> >>> But doing the same for the pgm file I get an error message. I have
> >>> looked for some specific command in GRASS to create de pgm but I
> >>> haven't found it.
> >> Add:
> >> 	export GRASS_TRANSPARENT=TRUE
> >>
> >> This will cause a PGM file to be written out in addition to the PPM
> >> file. The PGM file contains the mask.
> >>
> >>> Also looked for the mapdisp.tcl to take it a look
> >>> but I don't have it in my system (at least that's what I think).
> >> The file which performs the compositing is etc/gm/mapcanvas.tcl.
> >>
> >> --
> >> Glynn Clements <glynn at gclements.plus.com>
> >>
> >> __________ Información de NOD32 2134 (20070322) __________
> >>
> >> Este mensaje ha sido analizado con  NOD32 antivirus system
> >> http://www.nod32.com
> >
> >
> >
> > _______________________________________________
> > grassuser mailing list
> > grassuser at grass.itc.it
> > http://grass.itc.it/mailman/listinfo/grassuser
> >
> >
> 
> --
> Dr. Leonard Coop
> Assis. Prof. (Research), Dept Botany & Plant Pathology
> Integrated Plant Protection Center
> 2040 Cordley
> Oregon State University
> Corvallis OR 97331-2907
> Phone 541-737-5523
> http://pnwpest.org/coopl
> 
> __________ Información de NOD32 2136 (20070322) __________
> 
> Este mensaje ha sido analizado con  NOD32 antivirus system
> http://www.nod32.com