TOPO! Data Sets are widely regarded as the best available. We scanned every USGS Quadrangle (over 58,000), color corrected each one, and developed a seamless data set that spans all 50 states. The underlying DEM information is compiled at 1 Arc-second, or 30 meters. This provides you with a consistent data set that can be used for multiple topographic purposes. Use the hillshading feature to emphasize changes in elevation. Adjust the shading intensity for your preference or turn it off altogether to view the original USGS maps. Your data set is also edge-matched, making it easy to do large mosaics, without the hassles of removing collars or text. USGS data sets are the standard in topographic information, and we are pleased to provide them to you in single-state or multiple state sets.
Read more below about the benefits and features of TOPO! Data Sets.