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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.
This 1988 BLM map depicts the principal meridians and baselines used for surveying states (colored) in the Public Land Survey System.. The Public Land Survey System (PLSS) is the surveying method developed and used in the United States to plat, or divide, real property for sale and settling.
USNGapp.org is a free browser-based app which shows a mobile user's current USNG location. Once loaded, the app works without an Internet connection. A growing number of software applications incorporate or refer to the US National Grid. See the External Links section below for links to some of these, including The National Map (USGS).
Organic Maps is a free and open-source, offline navigation app that uses map data from OpenStreetMap. The application is designed to function without internet connectivity by downloading maps for offline use. Organic Maps emphasizes privacy, as it does not track user locations or collect personal data. [3] [4] [5] [6]
OpenStreetMap (abbreviated OSM) is a free, open map database updated and maintained by a community of volunteers via open collaboration. [4] Contributors collect data from surveys, trace from aerial photo imagery or satellite imagery, and import from other freely licensed geodata sources.
The 2003 press release of the partnership said that 300 million maps had been served from 1999 to 2003. [2] TopoZone was one of the first topographic mapping site on the web, providing visitors with free viewing and printing of the full set of United States Geological Survey topographic maps covering the entire United States.
NHS data (state-level) will have a name of the form SXXNHPN, where XX is the state's FIPS state code-- for example, S39NHPN for Ohio. Census/ESRI data, which is county-level, will be named tgrXXXXXabc, where XXXXX is the FIPS state code followed by the FIPS county code and abc is a code indicating which type of data the file represents -- for ...
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 ...