What Data Do We Use?

USGS Updated data

Elevation data sources

Resolution of Elevation Data
Source for CONUS and Hawai: USGS NED 1/3 at Seamless data distribution system

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 CONUS: NLCD 2011 Seamless data distribution system

Source Canada: Natural Resources Canada Circa 2000 at Geobase

Source Europe: Corine landcover at European Environment Agency

Source World: Globcover at European Environment Agency