TheUSGS Historical Topographic Map Exploreris an Esri web application that is part of the Living Atlas of the World. Not only can you compare maps using transparency sliders, but you can also download them. First, type in a city name in the search and click enter. Secondly, this will zoom...
ChartTiff offers Digital Maps, USGS and NAIP Aerial Photos, 3DEP, NED and DEM Elevation Data in various projections and file formats.
Get a comprehensive view of the United States with our detailed USGS topographic maps. Plan your next expedition with ease.
Although topographic maps are available from many suppliers, this work focuses on United States Geological Survey (USGS) maps. The extraction of contour lines, which are shown with brown color on USGS maps, is a difficult process due to aliasing and false colors induced by the scanning process ...
USGS survey markers, minor pack trails, creeks, springs, wells, alpine/vegetation area boundaries, and backcountry campsites. Even abandoned structures or mining equipment are commonly found on these maps. Topographical contour resolution can be as high as 20 feet, or even 5 meters in flatter ...
DIGITAL LINE GRAPH (DLG)are vector files generated on traditional paper topographic maps. For example, this includes townships & ranges, contour lines, rivers, lakes, roads, railroads, and towns. DIGITAL RASTER GRAPHIC (DRG)are images of a U.S. Geological Survey (USGS) standard series topograp...