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The National Map is part of the USGS National Geospatial Program. [3] The geographic information available includes orthoimagery (aerial photographs), elevation, geographic names, hydrography, boundaries, transportation, structures and land cover. The National Map is accessible via the Web, as products and services, and as downloadable data ...
Microsoft Research Maps (MSR Maps) was a free online repository of public domain aerial imagery and topographic maps provided by the United States Geological Survey (USGS). The site was a collaboration between Microsoft Research (MSR), Bing Maps, and the USGS. It was in operation from June 1998 to March 2016.
In 2008 the USGS abandoned traditional methods of surveying, revising, and updating topographic maps based on aerial photography and field checks. [34] Today's U.S. Topo quadrangle (1:24,000) maps are mass-produced, using automated and semiautomated processes, with cartographic content supplied from the National GIS Database. [ 34 ]
Included are historical maps and publications of USGS, as well as early publications of many federal, state and other geological surveys. Records of select geological societies are also maintained in the collection, such as the Geological Society of Washington, which was founded by John Wesley Powell and other noted scientists after the Civil ...
DRGs created by USGS are typically scanned at 250 dpi and saved as a TIFF. The raster image usually includes the original border information, referred to as the "map collar". The map file is UTM projected and georeferenced to the surface of the Earth. DRG's are regularly used in GIS applications. DRGs were first produced in 1995.
The National Geodetic Survey is an office of NOAA's National Ocean Service.Its core function is to maintain the National Spatial Reference System (NSRS), "a consistent coordinate system that defines latitude, longitude, height, scale, gravity, and orientation throughout the United States". [1]
Aerial Images was a part of the original project that involved Microsoft and Compaq as a demonstration of the real-world scalability of SQL Server and Microsoft's Windows NT Server. Aerial Images brought in satellite imagery from Sovinformsputnik (the Russian Federal Space Agency) and Orbital Imaging Corporation (later renamed GeoEye).
In the 21st century, computer technology and software are becoming portable and powerful enough to take on some of the more mundane tasks a geologist must perform in the field, such as precisely locating oneself with a GPS unit, displaying multiple images (maps, satellite images, aerial photography, etc.), plotting strike and dip symbols, and color-coding different physical characteristics of ...