| Classification | Azimuthal |
| Available forms | Forward and inverse, spherical projection |
| Defined area | Global |
| Alias | oea |
| Domain | 2D |
| Input type | Geodetic coordinates |
| Output type | Projected coordinates |
+proj=oea +m=1 +n=2
Described in Snyder1988.
+m=<value>
+n=<value>
+theta=<value>