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

$$x &= 2 \sqrt{2/3\pi} \lambda (1- |\phi|/\pi)$$$$y &= 2 \sqrt{2/3\pi}\phi$$

Parameters

Note

All parameters are optional for the Eckert I projection.