Free USA at 1/3 arc second resolution (10m)

Radio Mobile download site USA

Source: USGS NED 1/3 at Seamless data distribution system

Free North america at 1 arc second resolution (30m)

Radio Mobile download site USA

Radio Mobile download site Canada

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

Free World 3 arc second resolution (100m)

Radio Mobile download site USA

Radio Mobile download site Canada

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

Free World and USA in BIL format at up to 1/9 arc second resolution (3m)

Seamless data distribution system

Original SRTM

Shuttle Radar Topography Mission (SRTM) data products

Free USA Landcover - 1 arc second resolution (30m)

Radio Mobile download site USA

Source: USGS landcover 2001 by states

Free Canada Landcover - 1 arc second resolution (30m)

Radio Mobile download site Canada

Source: Natural Resources Canada Circa 2000 at Geobase

Free World Land cover at 30 arc second resolution (1km)

Land cover in the Plate Carre format is found at University of Maryland.

Download and unzip the following file:UMD1km_L.zip (35 meg).

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