| 0 |
Latitude/longitude grid equidistant cylindrical or Plate Carrée projection |
| 1 |
Mercator projection |
| 2 |
Gnomonic projection |
| 3 |
Lambert conformal, secant or tangent, conic or bi-polar, projection |
| 4 |
Gaussian latitude/longitude grid |
| 5 |
Polar stereographic projection |
| 6 |
Universal Transverse Mercator (UTM) projection |
| 7 |
Simple polyconic projection |
| 8 |
Albers equal-area, secant or tangent, conic or bi-polar, projection |
| 9 |
Millers cylindrical projection |
| 10 |
Rotated latitude/longitude grid |
| 11-12 |
Reserved |
| 13 |
Oblique Lambert conformal, secant or tangent, conic or bi-polar, projection |
| 14 |
Rotated Gaussian latitude/longitude grid |
| 15-19 |
Reserved |
| 20 |
Stretched latitude/longitude grid |
| 21-23 |
Reserved |
| 24 |
Stretched Gaussian latitude/longitude grid |
| 25-29 |
Reserved |
| 30 |
Stretched and rotated latitude/longitude grids |
| 31-33 |
Reserved |
| 34 |
Stretched and rotated Gaussian latitude/longitude grids |
| 35-49 |
Reserved |
| 50 |
Spherical harmonic coefficients |
| 51-59 |
Reserved |
| 60 |
Rotated spherical harmonic coefficients |
| 61-69 |
Reserved |
| 70 |
Stretched spherical harmonics |
| 71-79 |
Reserved |
| 80 |
Stretched and rotated spherical harmonic coefficients |
| 81-89 |
Reserved |
| 90 |
Space view, perspective or orthographic |
| 91-191 |
Reserved |
| 192-254 |
Reserved for local use Code tables relative to grid definition |