International Map of the World Polyconic

proj-string: +proj=imw_p +lat_1=30 +lat_2=-40

Parameters

Required

+lat_1=<value>

First standard parallel.

Defaults to 0.0.

+lat_2=<value>

Second standard parallel.

Defaults to 0.0.

Optional

+lon_0=<value>

Longitude of projection center.

Defaults to 0.0.

+R=<value>

Radius of the sphere given in meters. If used in conjunction with +ellps +R takes precedence.

+x_0=<value>

False easting.

Defaults to 0.0.

+y_0=<value>

False northing.

Defaults to 0.0.