What Data Do We Use?
The USGS Data set has been updated as of 12/12/2022
Updated USGS
As of 8/2/2022, 1/9 ARC Data is available for the United States
Ultra Vs Very High
Ultra High Vs High
Ultra High Vs Medium
Ultra Vs Low
As of 2/24/2020, USGS Landcover for the lower 48 has been updated to 2016 data
USGS Updated data
Elevation data sources
Resolution of Elevation Data
Source Shuttle Radar Topography Mission (SRTM) data products 1 arcsecond
Source for Alaska: USGS Alasaka NED 2 at Seamless data distribution system
Source for Northern Canada and void filling: Natural Resources Canada CDED at Geobase
Source for Northern Canada and void filling: Natural Resources Canada CANVEC at Geobase
Source for Northern Canada and void filling: ASTER
Source of SRTM Void filled for Eurasia: Viewfinder Panoramas
Land cover data sources
Landcover Resolution
Source Canada: Natural Resources Canada Circa 2000 at Geobase
Source Europe: Corine landcover at European Environment Agency
Source World: Globcover at European Environment Agency