![]() First, it uses a simple Cartesian coordinate system to specify locations rather than a more complex spherical coordinate system (the geographic coordinate system of latitude and longitude). Its popularity is due to at least two factors. The system is widely used for geographic data by state and local governments. There are 110 zones in the contiguous US, with 10 more in Alaska, 5 in Hawaii, and one for Puerto Rico and US Virgin Islands. Each state contains one or more state plane zones, the boundaries of which usually follow county lines. The State Plane Coordinate System ( SPCS) is a set of 124 geographic zones or coordinate systems designed for specific regions of the United States. ( November 2012) ( Learn how and when to remove this template message) Please help to improve this article by introducing more precise citations. This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations.
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