Hitt, Kerie J., 20050315, 1970's Land use data refined with 2000 population data to indicate new residential development for the conterminous United States.
This is a Raster data set. It contains the following raster data types:
The map projection used is Albers Conical Equal Area.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 100.0
Ordinates (y-coordinates) are specified to the nearest 100.0
Planar coordinates are specified in Meters
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is GRS1980.
The semi-major axis of the ellipsoid used is 6378137.000.
The flattening of the ellipsoid used is 1/298.257222.
This is one of the ancillary GIS (geographic information system) data layers developed to characterize USGS National Water-Quality Assessment (NAWQA) sampling sites and study areas for national synthesis of water-quality data. For background on the design of the NAWQA program see Gilliom and others (1995).
Fegeas, Robin G. , Claire, Robert W. , Guptill, Stephen C. , Anderson, K. Eric , and Hallam, Cheryl A. , 1983, Digital cartographic data standards: Land use and land cover digital data: USGS Circular 895-E, USGS, Reston, VA.
U.S. Environmental Protection Agency (USEPA), 1994, Land use and land cover data digital data from 1:250,000- and 1:100,000-Scale maps, digital quadrangles converted to ArcInfo format: USEPA, Washington, DC.
Hitt, Kerie, 20031124, 2000 population density by block group for the conterminous United States: USGS, Reston, VA.
Anderson, James R. , Hardy, Ernest E. , Roach, John T. , and Witmer, Richard E. , 1976, A land use and land cover classification system for use with remote sensor data: USGS Professional Paper 964, U.S. Government Printing Office, Washington, DC.
USGS, 1986, Land use and land cover data digital data from 1:250,000- and 1:100,000-scale maps, Data user guide 4: USGS, Reston, VA.
Hitt, Kerie J. , 1994, Refining 1970's land-use data with 1990 population data to indicate new residential development: USGS Water-Resources Investigations Report 94-4250, U.S. Geological Survey, Reston, Virginia.
Price, Curtis, Nakagaki, Naomi, Hitt, Kerie, and Clawges, Rick, 2003, Mining GIRAS: Improving on a national treasure of land use data: Proceedings of the ESRI International User Conference 2003, ESRI, Redlands, CA.
Gilliom, R.J., Alley, W.M., and Gurtz, M.E., 1995, Design of the National Water-Quality Assessment Program--Occurrence and distribution of water-quality conditions: USGS Circular 1112, USGS, Reston, VA.
Complete for conterminous United States.
The data set was spot checked with the 100-m source grid of
enhanced LULC and a similar derivative product consisting of a
100-m grid of LULC updated with 1990 population.
Some logical assumptions are that areas that were "new residential" urban land in 1990 would not revert to another land use in 2000 and that "new residential" areas would expand from 1990 to 2000. However, between 1990 and 2000, some Census block group boundaries changed, and population density shifted. As a result, some areas considered to be "new residential" in 1990 no longer are considered to be "new residential" in 2000. In some places, areas of "new residential" appear to be shrinking in 2000 because of the different block group boundaries. Population density in part of the area that used to be considered new residential is less than the population density threshold value in 2000. We do not plan to recompute population using another Census Bureau parameter.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None.
- Use_Constraints: This data should not be used at scales smaller than 1:250,000.
1-888-275-8747 (1-888-ASK-USGS) (voice)
Although this data set has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
|Data format:||100-m x 100-m cell size raster data set in format ArcInfo Workstation Grid Size: 57 megabytes|
|Data format:||GeoTIFF file and .aux file in format GeoTIFF image Size: 61 megabytes|
|Data format:||Color map file for ArcInfo Workstation Grid in format ascii Size: 3.3 kilobytes|
1-888-275-8747 (1-888-ASK-USGS) (voice)