Name

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      MAPCIRCI

Purpose

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      Interactive circle on a map. Select and list points.

Category

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Calling Sequence

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      mapcirci, x, y, r

Inputs

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Keyword Parameters

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Keywords

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        UNITS=units Units of radius (def=km).
          'km' Default.
          'miles' Statute miles.
          'nmiles' Nautical miles.
          'feet' Feet.
          'yards' Yards.
          'degrees' Degrees (great circle).
          'radians' Radians (great circle).
        PLNG, PLAT = optional arrays of point positions.
        PTXT = text array for points.
        SORT=sval Optional array to sort on (def=dist from center).
        LINES=n Number of lines to display at one time (def=10).
        MAXLINES=m Total number of lines with scrolling (def=all).
        COLOR=clr Plot color (def=255, not very useful for XOR).

Outputs

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      x,y = circle center long, lat. in, out
      r = circle radius. in, out

Common Blocks

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Notes

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      Notes: if PLNG, PLAT, PTXT given then text from PTXT is
        displayed in a text widget for points inside circle
          when left mouse button clicked.

Modification History

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      R. Sterner, 1996 Mar 22
      R. Sterner, 2009 Apr 10 --- Added empty to flush graphics buffer.
  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.