Table 1. Anderson classification scheme and the description for the modified classification scheme, including sub classes of managed clearings.

Anderson classification scheme level 1	Modified classification scheme	Description
Urban or built-up land	Impervious surfaces	Intensive use areas characterized by impervious structures
	Managed clearings—recreation	Highly managed with low to moderate possibility for change such as parks, lawns, recreational complexes, golf course, and greens.
	Managed clearings—transportation	Moderately managed with low to no chance for change such as grassy and treed medians and shoulders along roads, etc.
	Managed clearings—utility	Almost no management practices and with little chance for change, such as lands under electrical transmission lines, flood plains, etc.
Agricultural land	Farmland	Croplands and pastures
Rangeland †	Fallow land
Forest land	Forest	Deciduous, evergreen, mixed, and managed forests
Water	Water	Streams, canals, lakes and reservoirs
Wetland	Wetland
Barren land	Barren land	Areas of exposed soil, sand or rock
Tundra †
Perennial Snow or Ice†

†Not present in study system.