coyote: STATIONPLOT

NAME
STATIONPLOT
PURPOSE
This is routine for drawing station plots on a map or other display.
Normally, this routine is used in conjunction with WINDBARB.
AUTHOR
FANNING SOFTWARE CONSULTING
David Fanning, Ph.D.
1645 Sheely Drive
Fort Collins, CO 80526 USA
Phone: 970-221-0438
E-mail: david@idlcoyote.com
Coyote's Guide to IDL Programming: http://www.idlcoyote.com
CATEGORY
Graphics.
CALLING SEQUENCE
StationPlot, x, y
REQUIRED INPUTS
x:            The X location of the center of the station plot, expressed in data coordinates.
y:            The Y location of the center of the station plot, expressed in data coordinates.
KEYWORDS
COLOR:         The name of the color to draw the station plot in. May be a vector
               the same length as X. Colors are those available in cgColor.
RADIUS:        The radius of the station plot circle in normalized coordinates.
RESTRICTIONS
Requires cgColor from the Coyote Library:
    http://www.idlcoyote.com/programs/cgColor.pro
EXAMPLE
seed = -3L
lon = Randomu(seed, 20) * 360 - 180
lat = Randomu(seed, 20) * 180 - 90
speed = Randomu(seed, 20) * 100
direction = Randomu(seed, 20) * 180 + 90
Erase, cgColor('Ivory', !P.Background)
Map_Set, /Cylindrical,Position=[0.1, 0.1, 0.9, 0.9], Color=cgColor('Steel Blue'), /NoErase
Map_Grid, Color=cgColor('Charcoal', !D.Table_Size-2)
Map_Continents, Color=cgColor('Sea Green', !D.Table_Size-3)
StationPlot, lon, lat, Color='Indian Red'
MODIFICATION HISTORY
Written by:  David W. Fanning, 20 May 2003, based on TVCircle from the
NASA Astonomy Library.
Added THICK keyword. 23 February 2005. DWF.