Abbreviated codes used to identify vegetation types in the line maps;
TrRfr = Tropical Rain Forest
Sav = Tropical Savanna
Des, TrDes = Tropical Extreme Desert
SDes, TrSDes = Tropical Semi-Desert
Grs, TrGrs = Tropical grassland
Scr, TrScr = Tropical Scrub
Wdld, TrWdld = Tropical Woodland
MedScr = Mediterranean Scrub
MedFor, Meditn Forst = Mediterranean Forest
St-Tu = Steppe-Tundra
TempFor = Cool Temperate Forest
WmTempFor = Warm Temperate Forest
Tu = Tundra
Wdld, TempWdld = Temperate Open Woodland
St = Steppe
WdSt, Pkld = Wooded Steppe, Parkland
SDes, TempSDes = Temperate Semi-Desert
TempScr = Temperate Scrub
Des, TempDes = Temperate Desert
Tg, Brl = Taiga, Boreal Forest