USGS: Science Topics: map coordinate systems

Science Topics

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Map coordinate systems

Systems using sets of numbers combined with geometric nets or grids to specific positions on a map or globe.

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Results 1 - 3 of 3 listed alphabetically [list by similarity]

Datum shifts and digital map coordinate displays [More info]: Online GIS training course for users in GIS environments in resolving the differences in distances and coordinate readouts due to shifts in the 1927 and 1983 North American Datums when using Universal Transverse Mercator (UTM) grids.
Quadrangle indexes [More info]: GIS data files containing approximate boundaries of the various USGS quadrangles, with names and indexing codes associated with each quadrangle.
The Public Land Survey System (PLSS) [More info]: Explains the characteristics and history of this distinctive way of describing geographic position characteristic of the midwestern and western states of the US.

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U.S. Department of the Interior | U.S. Geological Survey
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