Eckert IV¶
Classification |
Pseudocylindrical |
Available forms |
Forward and inverse, spherical projection |
Defined area |
Global |
Alias |
eck4 |
Domain |
2D |
Input type |
Geodetic coordinates |
Output type |
Projected coordinates |
proj-string: +proj=eck4¶
\[x = \lambda(1+cos\phi) / \sqrt{ 2 + \pi }\]
\[y = 2 \phi / \sqrt { 2 + \pi }\]
Parameters¶
Note
All parameters are optional for the Eckert IV projection.
- +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,+Rtakes precedence.
- +x_0=<value>¶
False easting.
Defaults to 0.0.
- +y_0=<value>¶
False northing.
Defaults to 0.0.