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## 6.4.4 Robinson projection (-Jn -JN)

The Robinson projection, presented by the American geographer and cartographer Arthur H. Robinson in 1963, is a modified cylindrical projection that is neither conformal nor equal-area. Central meridian and all parallels are straight lines; other meridians are curved. It uses lookup tables rather than analytic expressions to make the world map ``look'' right6.3. The scale is true along latitudes ±38°. The projection was originally developed for use by Rand McNally and is currently used by the National Geographic Society. To use it you must enter

- The central meridian [Middle of your map].
- Scale along equator in inch/degree or 1:xxxxx (-Jn), or map width (-JN).

Again centered on Greenwich, the example below was created by this command:

    pscoast -Rd -JN4.5i -Bg30/g15 -Dc -A10000 -Ggray -P > GMT_robinson.ps

Figure 6.27: World map using the Robinson projection.

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