The National Elevation Dataset (NED) is the primary elevation data product of the USGS.
The ASTER Global Digital Elevation Model (ASTER GDEM) is a joint product developed and made available to the public by the Ministry of Economy, Trade, and Industry (METI) of Japan and the United States National Aeronautics and Space Administration (NASA).
The LIDAR collection has been acquired by the USGS through contracts, through partnerships with other Federal, state, tribal, or regional agencies, from direct purchases from private industry vendors, and through volunteer contributions from the science community.
GTOPO30 is a global digital elevation model (DEM) with a horizontal grid spacing of 30 arc seconds (approximately 1 kilometer).
The Shuttle Radar Topography Mission (SRTM) was flown aboard the space shuttle Endeavour February 11-22, 2000.
Geographic features (for example, hypsography, hydrography, boundaries, roads, utility lines, etc), using USGS 7.5-minute, 15-minute, 2-arc-second (30- by 60-minute), and 1:2 million-scale topographic quadrangle maps.
Other small scale maps covering New Zealand and its offshore islands at 1:250,000 (Topo250) or 1:50,000 (Topo50) scale, some Pacific islands and Antarctica's Ross Sea region included. Other maps can be reached at http://www.linz.govt.nz/topography/topo-maps
Please roll down to Land-Form PANORAMA, and click next. You will need to fill an application form
The National Historical Geographic Information System (NHGIS) provides, free of charge, aggregate census data and GIS-compatible boundary files for the United States between 1790 and 2012.
American FactFinder provides access to data about the United States, Puerto Rico and the Island Areas. The data in American FactFinder come from several censuses and surveys.
Mapping census geographic data based on data found in our MAF/TIGER database. Geodatabase format can be reached here: http://www.census.gov/geo/maps-data/data/tiger-data.html
Countries and lower level subdivisions such as provinces, departments, bundeslander, special areas, municipalities, counties, and thana.
Includes state, district, field office. Data can be downloaded via online map http://www.geocommunicator.gov/blmMap/MapLSIS.jsp
The National Land Cover Database (NLCD) serves as the definitive Landsat-based, 30-meter resolution, land cover database for the Nation. NLCD provides spatial reference and descriptive data for characteristics of the land surface such as thematic class (for example, urban, agriculture, and forest), percent impervious surface, and percent tree canopy cover.
Based on high-resolution elevation data obtained during a Space Shuttle flight for NASA's Shuttle Radar Topography Mission (SRTM) derivatives at multiple Scales(river networks, watershed boundaries, drainage directions, and flow accumulations)
Focuses in three coordinated levels on (1) large lakes and reservoirs, (2) smaller water bodies, and (3) wetlands.
Drainage area in USA
HYDRO1k is a geographic database developed to provide comprehensive and consistent global coverage of topographically derived data sets, including streams, drainage basins and ancillary layers derived from the USGS' 30 arc-second digital elevation model of the world (GTOPO30). HYDRO1k provides a suite of geo-referenced data sets, both raster and vector, which will be of value for all users who need to organize, evaluate, or process hydrologic information on a continental scale.
Earlham College • 801 National Road West • Richmond, Indiana 47374-4095