Interrupted Goode Homolosine

Classification	Pseudocylindrical
Available forms	Forward and inverse, spherical projection
Defined area	Global
Alias	igh
Domain	2D
Input type	Geodetic coordinates
Output type	Projected coordinates

The Interrupted Goode Homolosine projection is an equal-area composite projection intended for making world maps. Low latitudes are comprised of six separate Sinusoidal projection regions, and high latitudes are comprised of six separate Mollweide (homolographic) projections. The transition latitude is at 40d 44' 11.8", where the Sinusoidal and Mollweide scales are equal. The lobes in this projection are chosen to emphasize the land area of the Earth. This projection was first published in 1925 by J. P. Goode [Goode1925].

Parameters

Note

All parameters are optional for the projection.

+lon_0=<value>

Central meridian/longitude of natural origin, longitude of origin or longitude of false origin (naming and meaning depend on the projection method).

Defaults to 0.0.

Note

The default convention is to interpret this value as decimal degrees. To specify radians instead, follow the value with the "r" character.

Example: +lon_0=1.570796r

See Projection Units for more information.

+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, easting at false origin or easting at projection centre (naming and meaning depend on the projection method). Always in meters.

Defaults to 0.0.

+y_0=<value>

False northing, northing at false origin or northing at projection centre (naming and meaning depend on the projection method). Always in meters.

Defaults to 0.0.