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Mapping of population density.

C M Haaland1, M T Heath

  • 1Health Physics Division, Oak Ridge National Laboratory, 37830, Oak Ridge, Tennessee.

Demography
|January 29, 2011
PubMed
Summary
This summary is machine-generated.

This study created nationwide population density grids using 1970 U.S. Census data. It reveals that a significant portion of the U.S. population resides in highly concentrated urban areas, occupying a small percentage of the total land area.

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Area of Science:

  • Demography
  • Geographic Information Systems (GIS)
  • Urban Studies

Background:

  • Accurate population distribution data is crucial for urban planning and resource allocation.
  • Previous census data lacked granular geographical population density analysis.

Purpose of the Study:

  • To construct nationwide geographical grids of population density using 1970 U.S. Census data.
  • To analyze population distribution patterns and identify areas of high population concentration.

Main Methods:

  • Utilized Bureau of the Census data including geographical coordinates and population counts.
  • Developed five nationwide geographical grids with varying sector dimensions (0.01 to 0.25 degrees).
  • Assigned district populations to grid sectors based on centroid coordinates and rank-ordered sectors by population density.

Main Results:

  • Identified extreme population densities in small geographical areas (e.g., 800,000 people in 19 sectors of 0.01-degree dimensions with >100,000 people/sq mi).
  • Demonstrated that approximately 100 million people (half the U.S. population) reside within 0.6% of the nation's area (20,000 sq mi).
  • Synthesized data into equations describing population as a function of density and area.

Conclusions:

  • The U.S. population distribution is highly uneven, with a substantial concentration in urban centers.
  • The methodology provides a framework for detailed population density mapping and analysis.
  • Findings highlight the spatial inequality in population distribution across the United States.