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## 5.5.7 Van der Grinten Projection (-Jv -JV)

The Van der Grinten projection, presented by Alphons J. van der Grinten in 1904, is neither equal-area nor conformal. Central meridian and Equator are straight lines; other meridians are arcs of circles. The scale is true along the Equator only. Its main use is to show the entire world enclosed in a circle. To use it you must enter

  The central meridian

  Scale along equator in inch/degree or 1:xxxxx (-Jv), or map width (-JV)

Centered on the Dateline, the example below was created by this command:

    #!/bin/sh
    #    $Id: GMT_grinten.sh,v 1.1 2001/03/21 04:10:21 pwessel Exp $
    #

    pscoast -R0/360/-90/90 -JV180/4i -Bg30/g15 -Dc -G200 -A10000 -W0.25p -P > GMT_grinten.ps

Figure 5.34: World map using the Van der Grinten projection.

Next: 6. Cook-book Up: 5.5 Miscellaneous Projections Previous: 5.5.6 Sinusoidal Projection (-Ji Contents Index