Eckert I¶
Classification |
Pseudocylindrical |
Available forms |
Forward and inverse, spherical projection |
Defined area |
Global |
Alias |
eck1 |
Domain |
2D |
Input type |
Geodetic coordinates |
Output type |
Projected coordinates |
proj-string: +proj=eck1¶
\[ \begin{align}\begin{aligned}x &= 2 \sqrt{2/3\pi} \lambda (1- |\phi|/\pi)\\y &= 2 \sqrt{2/3\pi}\phi\end{aligned}\end{align} \]
Parameters¶
Note
All parameters are optional for the Eckert I 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.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.