Hammer & Eckert-Greifendorff¶
Classification |
Azimuthal |
Available forms |
Forward and inverse, spherical projection |
Defined area |
Global |
Alias |
hammer |
Domain |
2D |
Input type |
Geodetic coordinates |
Output type |
Projected coordinates |
Parameters¶
Note
All parameters are optional for the projection.
- +W=<value>¶
Set to 0.5 for the Hammer projection and 0.25 for the Eckert-Greifendorff projection.
+W
has to be larger than zero.Defaults to 0.5.
- +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.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.