Overview Download About the USGS Data Sets USGS NED and NLCD Data Set Bundle USGS National Elevation Dataset and National Land Cover Data nationwide coverage. The NED format is USGS BIL with a final size of 25 GB compressed. Delivered on six DVDs. The NLCD format is GeoTIFF with a final size of 1.6 GB compressed. Deliver on single DVD. North American SRTM 1" Data Set North American SRTM nationwide coverage. USGS BIL format with a final size of 17 GB compressed. Delivered on four DVDs. South American SRTM 3" Data Set COMING SOON! South American SRTM nationwide coverage. USGS BIL format. Delivered on one DVD. Custom Digital Elevation Model Data Set Specify a particular area, and data requirements, and we will be more than happy to supply all of your DEM data requirements. USGS NED, USGS 1:24 10 meter level 2, 30 meter level 2, and 30 meter level 1, USGS NLCD, North American SRTM 1", South American SRTM 3", TIGER, and Gazetteer nationwide coverage. Worldwide SRTM data will be released as it becomes available. Available in any public format and delivered on the medium of your choice. NLCD Atlas DEM For each: Open Water Perennial Ice/Snow Low Intensity Residential High Intensity Residential Commercial/Industrial/Transportation Bare Rock/Sand/Clay Quarries/Strip Mines/Gravel Pits Transitional Deciduous Forest Evergreen Forest Mixed Forest Shrubland Orchards/Vineyards/Other Grasslands/Herbaceous Pasture/Hay Row Crops Small Grains Fallow Urban/Recreational Grasses Woody Wetlands Emergent Herbaceous Wetlands