Purpose: To provide essential foundation-level high resolution spatial population distribution data for use in directsupport of the Homeland Security, Homeland Defense, and Emergency Response and Recovery missions to protect the nation's infrastructure in accordance with Presidential Policy Directive-8: National Preparedness (PPD-8), PPD-21: Critical Infrastructure Security and Resilience, and the National Strategy for Physical Protection of Critical Infrastructure and Key Assets.
Data Values: The values of the cells are integer population counts representing either the daytime or nighttime estimated population distribution. LandScan USA employs sub-models for different population components (residents, workers, prisoners, students, shoppers). Each sub-model begins with observed or estimated population counts for a defined area. The populations are redistributed to raster cells according to the relationship between spatial ancillary layers and population density. The ‘Value’ field in the database table refers to the estimated population in a cell, while the ‘Count’ field references the number of cells in the grid having that Value. Learn more about LandScan at
https://LandScan.ornl.gov.
This document is current as of July 27 2021
Features and Benefits
Use: Allows quick and easy assessment, estimation, and visualization of population.
Coverage Area: LandScan USA for Nighttime and Day-time, for the continental United States, Alaska (AK), and Hawaii (HI) and the U.S. Territories of Puerto Rico (PR), U.S. Virgin Islands (VI), Guam (GU), Northern Mariana Islands (MP), and American Samoa (AS).
Metadata: Includes the Federal Geographic Data Committee (FGDC) Metadata Standard as specified at: https://www.fgdc.gov/metadata/csdgm-standard
LandScan USA
https://landscan.ornl.gov/