Source: USGS NED 1/3 at Seamless data distribution system
Source for USA and Mexico: USGS NED 1 at Seamless data distribution system
Source above 40N: Shuttle Radar Topography Mission (SRTM) data products and non published SRTM for Canada
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
Main source: Shuttle Radar Topography Mission (SRTM) data products
Source for Alaska: USGS Alasaka NED 2 at Seamless data distribution system
Source for North of Canada: Natural Resources Canada CDED at Geobase
Source for North of Eurasia and Groendland: Viewfinder Panoramas
Source for Antartica at Radarsat Antarctic Mapping Project
Source of SRTM Void filled for Eurasia: Viewfinder Panoramas
Seamless data distribution system
Shuttle Radar Topography Mission (SRTM) data products
Source USA: USGS landcover 2001 by states
Source Canada: Natural Resources Canada Circa 2000 at Geobase
Land cover in the Plate Carre format is found at University of Maryland.
Download and unzip the following file:UMD1km_L.zip (35 meg).