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Start Over Year 1999 Place Canada Creator EROS Data Center
1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, and 2002. EROS Data Center. The grayscale North America shaded relief data were derived from the GTOPO30 elevation data. GTOPO30 is a global digital elevation model (DEM) with... National Atlas of the United States.