R and D 100 Award Winner, uses spatial data and imagery analysis technologies and a multi-variable dasymetric modeling approach to disaggregate census counts within an administrative boundary. Since no single population distribution model can account for the differences in spatial data availability, quality, scale, and accuracy as well as the differences in cultural settlement practices, LandScan population distribution models are tailored to match the data conditions and geographical nature of each individual country and region.
The population densiy in people/sq. mi. by Unitied States counties.
Total population counts per county in the United States.
The median age of the population in U.S. counties.
The average household size in number of persons by U.S. county
Gridded Population of the World, Version 3 (GPWv3) consists of estimates of human population for the years 1990, 1995, and 2000 by 2.5 arc-minute grid cells and associated datasets dated circa 2000. The data products include population count grids (raw counts), population density grids (per square km), land area grids (actual area net of ice and water), mean administrative unit area grids, centroids, a national identifier grid, national boundaries, and coastlines.
The Global Rural-Urban Mapping Project (GRUMP), Alpha Version consists of estimates of human population for the years 1990, 1995, and 2000 by 30 arc-second (1km) grid cells and associated datasets dated circa 2000. The data products include population count grids (raw counts), population density grids (per square km), land area grids (actual area net of ice and water), mean geographic unit area grids, urban extents grids, centroids, a national identifier grid, national boundaries, coastlines, and settlement points.
This dataset consists of polygonal boundaries for U.S. Census Blocks within the Coastal Zone with 2000 Census data at the block level. A Census Block is a subdivision of a census tract. Census blocks are small areas bounded on all sides by visible features such as streets, roads, streams, and railroad tracks, and by invisible boundaries such as city, town, township, and county limits, property lines, and short, imaginary extensions of streets and roads. A block is the smallest geographic unit for which the Census Bureau tabulates 100-percent data.
This dataset consists of polygonal boundaries for the 2000 Census Block Groups with 2000 Block Group level data. A census block group (BG) is a cluster of blocks that have the same first digit in their identifying number within a census tract. For example Block Group 2 (BG 2) within a census tract includes all blocks numbered from 2000 to 2999. Block groups generally contain between 600 and 3000 people with an optimum population size of 1500.
This dataset consists of polygonal boundaries for U.S. Counties with 2000 Block Group level data at the county level . Counties are the primary legal divisions of most States. In Louisiana the county equivalents are known as parishes. In Alaska beginning with 1980 census the county equivalents include organized boroughs and census areas delineated for statistical purposes by the State and U.S. Census Bureau. In Maryland Missouri Nevada and Virginia on or more cities are outside of any county organization and are treated as county equivalents for statistical purposes.