Natural Area Code
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The Natural Area Coding System is a new geodetic system that has generated a highly efficient code called Natural Area Code (NAC) to unify the representations of geographic coordinates, area codes, street addresses, postal codes, map grids and property identifiers of every location or area in the world, and make the information from all maps, GPS receivers and location based services and products directly connected, highly efficient and universal.
The official site for the system is .