Add planetary projections
In Planetary Sciences, the data are usually represented with 8 types of projections.
| Name | Image | Global view | Type | Property |
|---|---|---|---|---|
| Equirectangular |  |
yes | Cylindrical | Equidistant |
| Mollweide |  |
yes | Pseudo-cylindrical | Equal-area |
| Sinusoidal |  |
yes | Pseudo-cylindrical | Equal-area / Equidistant |
| Stereographic |  |
yes / no | Azimuthal | Conformal |
| Lambert azimuthal |  |
yes / no | Azimuthal | Equi-area |
| Azimuthal equidistant |  |
yes / no | Azimuthal | Equidistant |
| Orthographic |  |
no | Azimuthal | Perspective |
| Vertical perspective |  |
no | Azimuthal | Perspective |
Currently only the equirectangular centered at 180掳 is supported.
Implementation for the other projection can be achieved by extending the GroundProjection object.