Ps.map multi pane example

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If you want to show a number of raster maps side by side in a paneled figure you will have to do it in a two step process. The first step is to create each panel as an EPS file, the second step is to include these EPS files in the ps.map command file. In this example the GRASS 6.3 d.out.file module is used to create the intermediary Encapsulated PostScript files using the GRASS PostScript driver. You can just as well use ps.map with the -e flag to create the EPS files.

Fourmaps.jpg


This example uses the Speafish, South Dakota sample dataset.

Create a shaded relief map

g.region rast=elevation.dem
r.shaded.relief map=elevation.dem shad=elev.shad_relf

Create the EPS components

export GRASS_WIDTH=640
export GRASS_HEIGHT=480
d.mon x0

d.erase
d.his h=elevation.dem i=elev.shad_relf brighten=50
echo "A" | d.text -b color=black size=10 at=93,5
d.out.file output=elevation format=eps size=950,720

d.erase
d.his h=slope i=elev.shad_relf brighten=40
echo "B" | d.text -b color=black size=10 at=93,5
d.out.file output=slope format=eps size=950,720

d.erase
d.his h=landcover.30m i=elev.shad_relf brighten=55
echo "C" | d.text -b color=black size=10 at=93,5
d.out.file output=landcover format=eps size=950,720

d.erase
d.his h=trn.sites i=elev.shad_relf brighten=15
echo "D" | d.text -b color=black size=10 at=93,5
d.out.file output=training format=eps size=950,720


Create the ps.map map

ps.map -r out=fourmaps.ps << EOF
paper a4
  end
maploc 1.6 1
border 
  color white
  end
eps 25% 75%
  epsfile elevation.eps
  scale 0.25
  end
text 25% 53% Elevation
  fontsize 16
  end
eps 75% 75%
  epsfile slope.eps
  scale 0.25
  end
text 75% 53% Slope
  fontsize 16
  end
eps 25% 25%
  epsfile landcover.eps
  scale 0.25
  end
text 25% 3% Landcover
  fontsize 16
  end
eps 75% 25%
  epsfile training.eps
  scale 0.25
  end
text 75% 3% Training Areas
  fontsize 16
  end
end
EOF

Convert PostScript to PDF (ps2pdf comes with the gs-common Debian package)

ps2pdf13 fourmaps.ps