In our first example we will let the projection center be at the north pole. This means we have a polar stereographic projection and the map boundaries will coincide with lines of constant longitude and latitude. An example is given by
#!/bin/sh # $Id: GMT_stereographic_polar.sh,v 1.1 2001/03/21 04:10:21 pwessel Exp $ # gmtset DEGREE_FORMAT 1 pscoast -R-30/30/60/72 -Js0/90/4.5i/60 -Ba10g5/5g5 -Dl -A250 -G0 -P > GMT_stereographic_polar.ps