#!/bin/csh # $Id: job25.csh,v 1.10 2010/06/21 23:42:56 guru Exp $ # GMT EXAMPLE 25 # # Purpose: Display distribution of antipode types # GMT progs: gmtset, grdlandmask, grdmath, grd2xyz, gmtmath, grdimage, pscoast, pslegend # Unix progs: cat # Create D minutes global grid with -1 over oceans and +1 over land set D = 30 grdlandmask -Rg -I${D}m -Dc -A500 -N-1/1/1/1/1 -F -Gwetdry.nc # Manipulate so -1 means ocean/ocean antipode, +1 = land/land, and 0 elsewhere grdmath wetdry.nc DUP 180 ROTX FLIPUD ADD 2 DIV = key.nc # Calculate percentage area of each type of antipode match. grdmath -Rg -I${D}m -F Y COSD 60 $D DIV 360 MUL DUP MUL PI DIV DIV 100 MUL = scale.nc grdmath key.nc -1 EQ 0 NAN scale.nc MUL = tmp.nc grd2xyz tmp.nc -S -ZTLf >! key.b set ocean = `gmtmath -bi1s -Ca -S key.b SUM UPPER RINT =` grdmath key.nc 1 EQ 0 NAN scale.nc MUL = tmp.nc grd2xyz tmp.nc -S -ZTLf >! key.b set land = `gmtmath -bi1s -Ca -S key.b SUM UPPER RINT =` grdmath key.nc 0 EQ 0 NAN scale.nc MUL = tmp.nc grd2xyz tmp.nc -S -ZTLf >! key.b set mixed = `gmtmath -bi1s -Ca -S key.b SUM UPPER RINT =` # Generate corresponding color table cat << END >! key.cpt -1.5 blue -0.5 blue -0.5 gray 0.5 gray 0.5 red 1.5 red END # Create the final plot and overlay coastlines gmtset ANNOT_FONT_SIZE_PRIMARY +10p PLOT_DEGREE_FORMAT dddF grdimage key.nc -Sn -JKs180/9i -B60/30:."Antipodal comparisons":WsNE -K -Ckey.cpt -Y1.2i \ -U/-0.75i/-0.95i/"Example 25 in Cookbook" >! example_25.ps pscoast -R -J -O -K -Wthinnest -Dc -A500 >> example_25.ps # Place an explanatory legend below pslegend -R0/9/0/0.5 -Jx1i/-1i -O -Dx4.5/0/6i/0.3i/TC -Y-0.2i -Fthick << END >> example_25.ps N 3 S 0.15i s 0.2i red 0.25p 0.3i Terrestrial Antipodes [$land %] S 0.15i s 0.2i blue 0.25p 0.3i Oceanic Antipodes [$ocean %] S 0.15i s 0.2i gray 0.25p 0.3i Mixed Antipodes [$mixed %] END \rm -f *.nc key.* .gmt*