next up previous contents index
Next: 1.4.5.1 Exercises Up: 1.4 Laboratory Exercises Previous: 1.4.4.1 Exercises   Contents   Index

1.4.5 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; it is neither conformal nor equal-area. 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



Subsections
next up previous contents index
Next: 1.4.5.1 Exercises Up: 1.4 Laboratory Exercises Previous: 1.4.4.1 Exercises   Contents   Index
Paul Wessel 2006-05-31