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## 6.4.7 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 [Middle of your map].
- 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:

    pscoast -Rg -JV4i -Bg30/g15 -Dc -Glightgray -A10000 -Wthinnest -P > GMT_grinten.ps

Figure 6.33: World map using the Van der Grinten projection.

Next: 7. Creating GMT Graphics Up: 6.4 Miscellaneous projections Previous: 6.4.6 Sinusoidal projection (-Ji Contents Index