This command sets the map rotation angle for your map
projection.

Widget:
- There is no widget interface for this command.
Command:
Arguments:
- angle: the rotation angle in degrees.
Examples:
- ROTA=45
Rotates the map projection 45 degrees to the east.
Notes:
- To set the projection longitude, refer to PLON.
- To set the projection latitude, refer to PLAT.
- For more information on map projections, refer to the manual
for NCAR Graphics subroutine "Easy Map".
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