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## Cylindrical Equidistant Projection (-–Jq -–JQ)

This simple cylindrical projection is really a linear scaling of longitudes and latitudes (if you desire a different scaling for one of the axes you must choose the linear projection -–Jx and append d for degrees; see Section 5.1.4.) It is also known as the Plate Carrée projection. All meridians and parallels are straight lines. The requirements to define this projection are:

  The central meridian

  Scale in inch/degree or as 1:xxxxx (-Jq), or map width (-JQ)

A world map centered on the dateline using this projection can be obtained by running the command:

    pscoast -R0/360/-90/90 -JQ180/4.5i -B60f30g30 -Dc -A5000 -G0 -P >! GMT_equi_cyl.ps

Figure 5.23: World map using the equidistant cylindrical projection