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
,+R
takes precedence.
-
+x_0
=<value>
¶ False easting.
Defaults to 0.0.
-
+y_0
=<value>
¶ False northing.
Defaults to 0.0.