| Code figure | Meaning |
| 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 | Miller's 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 orthographic |
| 91-191 | Reserved |
| 192-254 | Reserved for local use |