The following table is based on that given in WMO publication no. 306 - Manual on Codes. The information is believed to be correct. However, the definitions in the WMO manual may be liable to change over time. If there is a difference between the information here and in the WMO manual, the WMO manual is the definitive source.
| Value | Meaning | gridType |
Comment |
|---|---|---|---|
| 0 | Latitude/longitude grid - equidistant cylindrical or Plate Carree projection projection | regular_ll reduced_ll |
- regular_gg for
ksec2(17)=0 - reduced_gg for ksec2(17)=1 |
| 1 | Mercator projection | mercator | |
| 2 | Gnomonic projection | ||
| 3 | Lambert conformal, secant or tangent, conical orbipolar, projection | lambert | |
| 4 | Gaussian latitude/longitude grid | regular_gg reduced_gg |
- regular_gg for
ksec2(17)=0 - reduced_gg for ksec2(17)=1 |
| 5 | Polar stereographic projection | polar_stereographic | |
| 6 | Universal Transverse Mercator (UTM) projection | UTM | |
| 7 | Simple polyconic projection | simple_polyconic | |
| 8 | Albers equal-area, secant or tangent, conic or bi-polar, projection | ||
| 9 | Miller's cylindrical projection | ||
| 10 | Rotated latitude/longitude grid | rotated_ll | |
| 11- 12 | Reserved | ||
| 13 | Oblique Lambert conformal, secant or tangent, conical or bipolar, projection | ||
| 14 | Rotated gaussian latitude/longitude grid | rotated_gg | |
| 15 - 19 | Reserved | ||
| 20 | Stretched latitude/longitude grid | stretched_ll | |
| 21 - 23 | Reserved | ||
| 24 | Stretched gaussian latitude/longitude grid | stretched_gg | |
| 25 - 29 | Reserved | ||
| 30 | Stretched and rotated latitude/longitude grid | stretched_rotated_ll | |
| 31 - 33 | Reserved | ||
| 34 | Stretched and rotated gaussian latitude/longitude grid | stretched_rotated_gg | |
| 35 - 49 | Reserved | ||
| 50 | Spherical harmonic coefficients | sh | |
| 51 - 59 | Reserved | ||
| 60 | Rotated spherical harmonic coefficients | rotated_sh | |
| 61 - 69 | Reserved | ||
| 70 | Stretched spherical harmonic coefficients | stretched_sh | |
| 71 - 79 | Reserved | ||
| 80 | Stretched and rotated spherical harmonic coefficients | stretched_rotated_sh | |
| 81 - 89 | Reserved | ||
| 90 | Space view, perspective or orthographic | space_view | |
| 91 - 191 | Reserved | ||
| 192 | ECMWF ocean data | ||
| 193 - 254 | Reserved for local use |