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Table 23
Reserved celestial coordinate algorithm codes.
| Default | ||||
| Code | φ 0 | θ 0 | Properties1 | Projection name |
|
|
||||
| Zenithal (azimuthal) projections | ||||
| AZP | 0° | 90° | Sect. 5.1.1 | Zenithal perspective |
| SZP | 0° | 90° | Sect. 5.1.2 | Slant zenithal perspective |
| TAN | 0° | 90° | Sect. 5.1.3 | Gnomonic |
| STG | 0° | 90° | Sect. 5.1.4 | Stereographic |
| SIN | 0° | 90° | Sect. 5.1.5 | Slant orthographic |
| ARC | 0° | 90° | Sect. 5.1.6 | Zenithal equidistant |
| ZPN | 0° | 90° | Sect. 5.1.7 | Zenithal polynomial |
| ZEA | 0° | 90° | Sect. 5.1.8 | Zenithal equal-area |
| AIR | 0° | 90° | Sect. 5.1.9 | Airy |
|
|
||||
| Cylindrical projections | ||||
| CYP | 0° | 0° | Sect. 5.2.1. | Cylindrical perspective |
| CEA | 0° | 0° | Sect. 5.2.2 | Cylindrical equal area |
| CAR | 0° | 0° | Sect. 5.2.3 | Plate carrée |
| MER | 0° | 0° | Sect. 5.2.4 | Mercator |
|
|
||||
| Pseudo-cylindrical and related projections | ||||
| SFL | 0° | 0° | Sect. 5.3.1 | Samson-Flamsteed |
| PAR | 0° | 0° | Sect. 5.3.2 | Parabolic |
| MOL | 0° | 0° | Sect. 5.3.3 | Mollweide |
| AIT | 0° | 0° | Sect. 5.3.4 | Hammer-Aitoff |
|
|
||||
| Conic projections | ||||
| COP | 0° | θ a | Sect. 5.4.1 | Conic perspective |
| COE | 0° | θ a | Sect. 5.4.2 | Conic equal-area |
| COD | 0° | θ a | Sect. 5.4.3 | Conic equidistant |
| COO | 0° | θ a | Sect. 5.4.4 | Conic orthomorphic |
|
|
||||
| Polyconic and pseudoconic projections | ||||
| BON | 0° | 0° | Sect. 5.5.1 | Bonne’s equal area |
| PCO | 0° | 0° | Sect. 5.5.2 | Polyconic |
|
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||||
| Quad-cube projections | ||||
| TSC | 0° | 0° | Sect. 5.6.1 | Tangential spherical cube |
| CSC | 0° | 0° | Sect. 5.6.2 | COBE quadrilateralized spherical cube |
| QSC | 0° | 0° | Sect. 5.6.3 | Quadrilateralized spherical cube |
|
|
||||
| HEALPix grid projection | ||||
| HPX | 0° | 0° | Sect. 62 | HEALPix grid |
Notes.
(1)
Refer to the indicated section in Calabretta & Greisen (2002) for a detailed description.
(2)
This projection is defined in Calabretta & Roukema (2007).
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