`plmap`: Plot continental outline in world coordinates
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#### `plmap`: Plot continental outline in world coordinates

`plmap (` | mapform,
| type,
| minlong,
| maxlong,
| minlat,
| maxlat`)`;

Plots continental outlines in world coordinates. examples/c/x19c demonstrates how to use this function to create different projections.

`mapform` (`void (*) (PLINT, PLFLT *, PLFLT *)`, input)

  A user supplied function to transform the coordinate longitudes and latitudes to a plot coordinate system. By using this transform, we can change from a longitude, latitude coordinate to a polar stereographic project, for example. Initially, x[0]..[n-1] are the longitudes and y[0]..y[n-1] are the corresponding latitudes. After the call to mapform(), x[] and y[] should be replaced by the corresponding plot coordinates. If no transform is desired, mapform can be replaced by NULL.

`type` (`const char *`, input)

  type is a character string. The value of this parameter determines the type of background. The possible values are:

  - `"globe"` -- continental outlines

  - `"usa"` -- USA and state boundaries

  - `"cglobe"` -- continental outlines and countries

  - `"usaglobe"` -- USA, state boundaries and continental outlines

`minlong` (`PLFLT`, input)

  The value of the longitude on the left side of the plot. The value of minlong must be less than the value of maxlong, and the quantity maxlong-minlong must be less than or equal to 360.

`maxlong` (`PLFLT`, input)

  The value of the longitude on the right side of the plot.

`minlat` (`PLFLT`, input)

  The minimum latitude to be plotted on the background. One can always use -90.0 as the boundary outside the plot window will be automatically eliminated. However, the program will be faster if one can reduce the size of the background plotted.

`maxlat` (`PLFLT`, input)

  The maximum latitudes to be plotted on the background. One can always use 90.0 as the boundary outside the plot window will be automatically eliminated.

Redacted form:

- General: `plmap(mapform, type, minlong, maxlong, minlat, maxlat)`

- F95, Java, Perl/PDL, Python: Not implemented?

This function is used in example 19.

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