This function returns the correct UTM zone for UTM map projections, given a longitude
  and latitude value. Southern hemisphere zones are indicated by a negative value.

Categories

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    Utility
   

Params

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    longitude: in, required, type=float
      The requested longitude value east of the central meridian.
    latitude: in, required, type=float
      The requested latitude value in the range -90 to 90.
     

Keywords

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    formal: out, optional, type=string
      The formal UTM zone designation, with the zone number and band letter combined. For example, "32M".

Examples

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    For example, to find the UTM zone for London, England::
      Print, cgUTMZone(-1.062, 51.5171, FORMAL=strDesignation)
          30
      Print, strDesignation
          30U

Author

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    FANNING SOFTWARE CONSULTING::
      David W. Fanning
      1645 Sheely Drive
      Fort Collins, CO 80526 USA
      Phone: 970-221-0438
      E-mail: [email protected]
      Coyote's Guide to IDL Programming: http://www.idlcoyote.com

History

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    Written, 8 August 2012.
    Modified to assure the UTM band index is always in range for polar map projections. 22 Sept 2012. DWF.

Copyright

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    Copyright (c) 2012, Fanning Software Consulting, Inc.