1.7.5 Orthographic projection

The azimuthal orthographic projection (-–JG) is one of several projections with similar syntax and behavior; the one we have chosen mimics viewing the Earth from space at an infinite distance. The syntax for this projection is

-–JG $lon_0/lat_0/width$

where ($lon_0, lat_0$) is the center of the map (projection). As an example we will try

pscoast –-R0/360/-90/90 –-JG280/30/6i –-Bg30/g15 -–Dc -–A5000 –-G255/255/255 \
    -–S150/50/150 –-P >! map.ps