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1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, and 2002. USGS National Center for EROS. The North America Shaded Relief data were derived from the GTOPO30 elevation data. GTOPO30 is a global digital elevation model (DEM) with a horizon... National Atlas of the United States.
2002. National Atlas of the United States. The color Puerto Rico and U.S. Virgin Islands shaded relief data were derived from National Elevation Dataset (NED) data, and show the terrain of P... National Atlas of the United States.
2002. National Atlas of the United States. The color Puerto Rico and U.S. Virgin Islands shaded relief data were derived from National Elevation Dataset (NED) data, and show the terrain of P... National Atlas of the United States.
2015. Sacramento County GIS. This polyline shapefile contains 2-foot contours of the County of Sacramento, California. This layer is part of a collection of data originally pro... Sacramento County GIS.
2015. Armstrong, Jake H. This polyline shapefile depicts 5 foot elevation contour lines for the County of Solano, California. This layer is part of a collection of GIS data... Solano County Department of Information Technology.
2015. Garcia, Paul and Price, Matt. This polyline shapefile depicts for 50-foot contours for the County of Santa Cruz, California. This layer is part of a collection of GIS data creat... County of Santa Cruz Information Services Department.
2015. County of San Mateo Information Services Department. This polyline shapefile depicts 20 foot elevation contour lines for the County of San Mateo. This layer is part of a collection of GIS data for San... County of San Mateo Information Services Department.
1974. Rosenberg, Lewis I. This digital raster graphic (DRG) is a composite raster image of two scanned 1974 USGS topographic maps including the collar information, georefere... Lew Rosenberg, Consulting Geologist.
2002. EROS Data Center. The grayscale Alaska shaded relief data were derived from National Elevation Dataset (NED) data, and show the terrain of Alaska at a resolution of ... National Atlas of the United States.
2002. EROS Data Center. The grayscale Alaska shaded relief data were derived from National Elevation Dataset (NED) data, and show the terrain of Alaska at a resolution of ... National Atlas of the United States.