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| Re: Automated Map colors [message #81048 is a reply to message #81045] |
Mon, 30 July 2012 15:58  |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Wayne Landsman writes:
> I have a program that creates connected filled polygons
> It ends up looking like a map where each country is
> in a different color (or at least countries that
> border on each other have a different color).
> Right now I choose my colors by getting an array of
> color names from cgcolor(/names), and randomly
> assigning a color to each polygon. Sometimes this
> looks OK, and sometimes it looks, um, like the
> colors were chosen at random. Anyone have any
> suggestions on how to intelligently pick colors
> for a map?
I think I would probably stick to one of the Brewer
color tables, which were made specifically to look
good on maps:
http://colorbrewer2.org/
I'd probably down-sample to the number of colors I
needed, and pick randomly from that list. I'd probably
try Brewer color table 27 if I were going to start
somewhere:
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
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