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Acres of Large Urban Built-Up Land

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Description

This map shows the number of acres in large urban and built-up areas (10 acres or larger) in each state for the years 1982, 1987, 1992, and 1997. The bars are proportional to the amount of large urban and buit-up areas in the state. National totals for each year are also given. All data values are in hundreds of acres.

Cautions for this Product:
Data are not collected on Federal land. The national bar chart is not proportional to the state bar charts.



Sources

Source: National Resources Inventory, 1997
Distributor: USDA-NRCS-RIAD
Reliability:
NRI sample data are generally reliable at the 95% confidence interval for state and certain broad substate area analyses. Generally, analyses that aggregate data points by smaller geographic areas and/or more specific criteria result in fewer data points for each aggregation and therefore less reliable estimates. NRI maps reflect national patterns rather than site- specific information.


Layers

Aggregate Layer: State
Other Layers Displayed:


Definitions

Developed land:
A combination of land cover/use categories, Urban and built-up areas, and Rural Transportation Land.

Large urban and built-up areas:
A land cover/use category composed of developed tracts at least 10 acres in size, meeting the definition of "Urban and Built-up Areas" (see definition). [NRI-97]

Urban and built-up areas:
A Land Cover/Use category consisting of residential, industrial, commercial, and institutional land; construction sites; public administrative sites; railroad yards; cemeteries; airports; golf courses; sanitary landfills; sewage treatment plants; water control structures and spillways; other land used for such purposes; small parks (less than 10 acres) within urban and built-up areas; and highways, railroads, and other transportation facilities if they are surrounded by urban areas. Also included are tracts of less than 10 acres that do not meet the above definition but are completely surrounded by Urban and Built-up land. Two size categories are recognized in the NRI: (i) areas 0.25 to 10 acres, and (ii) areas greater than 10 acres. [NRI-97]


Product Information

Product ID: 5792
Production Date: 12/1/00
Product Type: Map


For additional information contact the Resources Inventory and Assessment Division. Please include the Product ID you are inquiring about. nri@wdc.usda.gov or 1400 Independence Avenue SW - P.O. Box 2890 - Washington D.C. 20013. If you use our analysis products, please be aware of our disclaimer.