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NLCD 1992/2001 Retrofit Land Cover Change

Product Legend

The classification system used by the NLCD 1992/2001 Retrofit Land Cover Change Product is modified from the Anderson Land Cover Classification System*.

ModifiedAnderson Level 1 Class Codes and Descriptions
0 No Data
1 Open Water - all areas of open water, generally with less than 25% vegetation or soil cover. Pixels coded to a value of 1 have not changed between 1992 and 2001.
2 Urban - includes developed open spaces with a mixture of some constructed materials, but mostly vegetation in the form of lawn grasses such as large-lot single-family housing units, parks, golf courses, and vegetation planted in developed settings for recreation, erosion control, or aesthetic purposes. Also included are lands of low, medium, and high intensity with a mixture of constructed materials and vegetation, such as single-family housing units, multifamily housing units, and areas of retail, commercial, and industrial uses. Pixels coded to a value of 2 have not changed between 1992 and 2001.
3 Barren - barren areas of bedrock, desert pavement, scarps, talus, slides, volcanic material, glacial debris, sand dunes, strip mines, gravel pits, and other accumulations of earthen material. Generally, vegetation accounts for less than 15% of total cover. Pixels coded to a value of 3 have not changed between 1992 and 2001.
4Forest - areas dominated by trees generally taller than 5 meters, and greater than 20% of total vegetation cover. Includes deciduous forest, evergreen forest, and mixed forest. Pixels coded to a value of 4 have not changed between 1992 and 2001.
4Grassland/Shrub - grassland areas dominated by graminoid or herbaceous vegetation and shrub/scrub areas dominated by shrubs less than 5 meters tall with shrub canopy typically greater than 20% of total vegetation, including true shrubs, young trees in an early successional stage, or trees stunted due to harsh environmental conditions. Management techniques that associate soil, water, and forage-vegetation resources are more suitable for rangeland management than are practices generally used in managing pastureland. Some rangelands have been or may be seeded to introduced or domesticated plant species. Includes those areas in the Eastern United States that commonly are called brush lands. Pixels coded to a value of 5 have not changed between 1992 and 2001 (Anderson et al., 1976).
6Agriculture - cultivated crops and pasture/hay Cultivated crops are described as areas used for the production of annual crops, such as corn, soybeans, vegetables, tobacco, and cotton, and also perennial woody crops such as orchards and vineyards. This class also includes all actively tilled land. Pasture/Hay is described as grasses, legumes, or grass-legume mixtures planted for livestock grazing or the production of seed or hay crops, typically on a perennial cycle. Pixels coded to a value of 6 have not changed between 1992 and 2001.
7Wetlands - woody wetlands and herbaceous wetlands Areas where forest or shrubland vegetation accounts for greater than 20 percent of vegetative cover and the soil or substrate is periodically saturated with or covered with water. This class also includes areas where perennial herbaceous vegetation accounts for greater than 80 percent of vegetative cover and the soil or substrate is periodically saturated with or covered with water. Pixels coded to a value of 7 have not changed between 1992 and 2001.
8Ice/Snow - all areas characterized by a perennial cover of ice and/or snow, generally greater than 25% of total cover. Pixels coded to a value of 8 have not changed between 1992 and 2001.
12Open Water to Urban
13Open Water to Barren
14Open Water to Forest
15Open Water to Grassland/Shrub
16Open Water to Agriculture
17Open Water to Wetlands
18Open Water to Ice/Snow
21Urban to Open Water
23Urban to Barren
24Urban to Forest
25Urban to Grassland/Shrub
26Urban to Agriculture
27Urban to Wetlands
28Urban to Ice/Snow
31Barren to Open Water
32Barren to Urban
34Barren to Forest
35Barren to Grassland/Shrub
36Barren to Agriculture
37Barren to Wetlands
38Barren to Ice/Snow
41Forest to Open Water
42Forest to Urban
43Forest to Barren
45Forest to Grassland/Shrub
46Forest to Agriculture
47Forest to Wetlands
48Forest to Ice/Snow
51Grassland/Shrub to Open Water
52Grassland/Shrub to Urban
53Grassland/Shrub to Barren
54Grassland/Shrub to Forest
56Grassland/Shrub to Agriculture
57Grassland/Shrub to Wetlands
58Grassland/Shrub to Ice/Snow
61Agriculture to Open Water
62Agriculture to Urban
63Agriculture to Barren
64Agriculture to Forest
65Agriculture to Grassland/Shrub
67Agriculture to Wetlands
68Agriculture to Ice/Snow
71Wetlands to Open Water
72Wetlands to Urban
73Wetlands to Barren
74Wetlands to Forest
75Wetlands to Grassland/Shrub
75Wetlands to Agriculture
81Ice/Snow to Open Water
82Ice/Snow to Urban
83Ice/Snow to Barren
84Ice/Snow to Forest
85Ice/Snow to Grassland/Shrub
86Ice/Snow to Agriculture
87Ice/Snow to Wetland

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Page Last Modified: March 13, 2014