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The Libre Map Project was started by Jared Benedict and around 100 additional individuals contributing money to purchase (or "liberate") a full set of 1:24K scale USGS topographic maps in Digital raster graphic form. [1] The map files were then hosted by archive.org to ensure the map data will continue to be freely available to everyone ...
This is a list of satellite map images with missing or unclear data. Some locations on free, publicly viewable satellite map services have such issues due to having been intentionally digitally obscured or blurred for various reasons of this. [ 1 ]
From 1974 until the early-2000s, the map production area was the printing plant for USGS topographic maps and other paper products. The USGS Library, authorized by Congress in 1879, houses one of the world’s largest Earth and natural science collections. [5] The building originally had the capacity to house nearly 2,500 employees. [4]
Georeferenced map images are available from the USGS as digital raster graphics (DRGs) in addition to digital data sets based on USGS maps, notably digital line graphs (DLGs) and digital elevation models (DEMs). In 2015, the USGS unveiled the topoView website, a new way to view their entire digitized collection of over 178,000 maps from 1884 to ...
Charting North America, maps and atlases in the New York Public Library Digital Collection; Online digitized versions of many 18th- and 19th-century American atlases, as well as the 1897 Rand McNally Indexed Atlas of the World and many other maps, can be found at DavidRumsey.com. Hipkiss' Scanned Old Maps from Atlases and any old books with ...
A small portion of a USGS DRG. A digital raster graphic (DRG) is a digital image resulting from scanning a paper USGS topographic map for use on a computer. DRGs created by USGS are typically scanned at 250 dpi and saved as a TIFF. The raster image usually includes the
TopoQuest is a free web mapping service built on open source software that provides internet-based topographic map for most of the United States.. The site is one of three internet services used by Wikipedia for providing topographic maps.
The National Map is a significant contribution to the U.S. National Spatial Data Infrastructure (NSDI) from the Federal Geographic Data Committee (FGDC) and currently is being transformed to better serve the geospatial community by providing high quality, integrated geospatial data and improved products and services including new generation ...