| Key |
| 1 | tropical evergreen rainforest |
| 2 | trop/subtropical evergreen seasonal broad-leaved forest |
| 3 | subtropical evergreen rainforest |
| 4 | temperate/subpolar evergreen rainforest |
| 5 | temperate evergreen seasonal broadleaved forest, summer rain |
| 6 | evergreen broadleaved sclerophyllous forest, winter rain |
| 7 | tropical/subtropical evergreen needle-leaved forest |
| 8 | tempierate/subpolar evergreen needle-leaved forest |
| 9 | tropical/subtropical drought-deciduous forest |
| 10 | cold-deciduous forest, with evergreens |
| 11 | cold-deciduous forest, without evergreens |
| 12 | xeromorphic forest/woodland |
| 13 | evergreen broadleaved sclerophyllous woodland |
| 14 | evergreen needleleaved woodland |
| 15 | tropical/subtropical drought-deciduous woodland |
| 16 | cold-deciduous woodland |
| 17 | evergreen broadleaved shrubland/thick, evergreen dwarf-shrubland |
| 18 | evergreen needleleaved or microphyllous shrubland/thicket |
| 19 | drought-deciduous shrubland/thicket |
| 20 | cold-deciduous subalpine/subpolar shrubland/dwarf shrub |
| 21 | xeromorphic shrubland/dwarf shrubland |
| 22 | arctic/alpine tundra, mossy bog |
| 23 | tall/medium/short grassland, 10-40% woody cover |
| 24 | tall/medium/short grassland, < 10% woody cover |
| 25 | tall/medium/short grassland, shrub cover |
| 26 | tall grassland, no woody cover |
| 27 | medium grassland, no woody cover |
| 28 | meadow, short grassland, no woody cover |
| 29 | forb formations |
| 30 | desert |
| 31 | ice |
| 32 | cultivation |
Matthews, E. 1984. Prescription of Land-surface Boundary Conditions in GISS GCM II: A Simple Method Based on High-resolution Vegetation Data Sets. NASA TM-86096. National Aeronautics and Space Administration. Washington, D.C.