Polyconic (American)

Classification

Pseudoconical

Available forms

Forward and inverse, spherical and ellipsoidal

Defined area

Global

Alias

poly

Domain

2D

Input type

Geodetic coordinates

Output type

Projected coordinates
Polyconic (American)

proj-string: +proj=poly

Parameters

Note

All parameters are optional for projection.

+lon_0=<value>

Longitude of projection center.

Defaults to 0.0.

+ellps=<value>

The name of a built-in ellipsoid definition.

See Ellipsoids for more information, or execute proj -le for a list of built-in ellipsoid names.

Defaults to “GRS80”.

+R=<value>

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

See Ellipsoid size parameters for more information.

+x_0=<value>

False easting.

Defaults to 0.0.

+y_0=<value>

False northing.

Defaults to 0.0.