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      Interactive great circle on a map.


Calling Sequence

      mapgci, a, b


Keyword Parameters


        UNITS=unt Units of displayed length:
          'kms' Default.
          'miles' Statute miles.
          'nmiles' Nautical miles.
          'feet' Feet.
          'yards' Yards.
          'degrees' Degrees.
          'radians' Radians.
        START=n Initial active point (1=A def, 2=B).
        THICKNESS=thk Line thickness.
        LINESTYLE=sty Line style.
        /NOHELP means do not display help box.


Common Blocks


      NOTES=notes_txt Extra text string or array to add
        after help text (def=none).
      Notes: XOR plot mode is used to display line.
        Line parameters are displayed.

Modification History

      R. Sterner, 1996 Mar 5
      R. Sterner, 2002 Jun 28 --- Cleaned up a bit.
      R. Sterner, 2002 Sep 03 --- Added NOTES=txt and moved from old lib.
      R. Sterner, 2003 Dec 29 --- Fixed default line, added some help text.
      R. Sterner, 2005 Jul 26 --- Step size fix.
      R. Sterner, 2007 Dec 10 --- Added START=n, initial atcive point.
      R. Sterner, 2008 Jul 01 --- Fixed undefined IDC bug.
  Copyright (C) 1996, Johns Hopkins University/Applied Physics Laboratory
  This software may be used, copied, or redistributed as long as it is not
  sold and this copyright notice is reproduced on each copy made. This
  routine is provided as is without any express or implied warranties
  whatsoever. Other limitations apply as described in the file disclaimer.txt.

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