GIS and Public Data
Mapping Basics and Source Data.Raster Images: Digital Raster Graphics, Digital Orthophoto Quarter Quads.Vector Topographic Map Layers: Digital Line Graphs in 2 formats.Elevation Data: DEMs, the National Elevation Data, and Shuttle Radar Topography Mission Data.Land Cover Data: Land Use/Land Cover Data and the National Land Cover Data Set.Census Geography: TIGER.Census 2000 Data: Summary Files 1 and 3.National Hydrography Dataset.