float tspCalcCentralMeridian ( int utm_zone )

Calculate the Central Meridian of a UTM Zone (degrees)

Documentation

Calculate the Central Meridian of a UTM Zone (degrees).

Takes a UTM zone number and returns the central meridian which that zone corresponds to. The function checks that the zone is in range (zones range from 1 to 60). For a diagram of the relationship between these two values, check out Snyder, J. P. (1987). "Map Projections: A Working Manual", Professional Paper 1395, U.S. Geological Survey.

If you wish to find the UTM zone/easting of the central meridian, then you can use the tsmGeoToUTM function to transfor, the result of this function.

Returns:
the central meridian if successful. 0.0 if failed. (N.B. 0.0 is not a valid central meridian)
Parameters:
utm_zone - the UTM zone to calculate the central meridian for
Author:
Martin Reddy
Version:
21 August 1997
See Also:
tspCalcUTMZone, tspCalcGeoidSeparation, tsmGeoToUTM

TSMAPI_RELEASE 2.1 - Release Date: 2001/01/10 19:01:12

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