Vegetative information collected included current vegetation, historical
vegetation, potential natural vegetation, and lifeform. Vegetation information
was collected at the broadscale (1kilometer (km)) and for subsample areas
at the midscale (1:24,000). Current broadscale vegetation cover and structure
types were classified from the Advanced Very High Resolution Radiometer
(AVHRR) satellite imagery (1 km) dataset. Historic cover type and structure
for the broadscale were compiled from numerous records such as early US
Government land surveys descriptions. Potential vegetation types were determined
by subdividing the Basin into warm/dry to cool/moist environments and associating
the potential vegetation types and groups with them.
