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2. Projection Parameters
Projection parameters are in these publications area on the NGS website:
- SPC 27 - Special Publication 62-4 State Plane Coordinates by Automatic Data Processing
- SPC 83 - NOAA Manual NOS NGS 5 State Plane Coordinate Systems of 1983
These publications also contain equations for converting between geodetic and state plane coordinates, grid scale calculation, and determining the arc-to-chord correction.