Download GIS Data Sets
ARC/INFO export files:
ArcView Shapefile (3.5MB compressed)
Ecoregions of the Continents (12.5MB compressed, jpeg, 5K x 3.2K pixels)
The continental ecoregions map has been reprojected to geodetic coordinates (lat/long) at the World Conservation Monitoring Centre. It is available from NOAA's National Geophysical Data Center.