(I found this in my 'draft' folder. Granted this is like three months old,
but what is a bit of temporal distortion amongst friends?)
Hi Bryce,
When you first sent out your email I spent a bit of time visiting the
issue.
I played around a bit with the question of creating icons to let you convey
a range. Here are some icons:
http://testingrange.com/geotest/icon/colortest.html. The page includes a
link to the source code I used to generate them.
These will likely remain up, but don't count on it :-)
They were generated with a perl script calling image magick using the
-modulate option.
Using the Hue, Saturation, Value/Brightness (HSV or HSB) color model seems
to make it easier
to create gradients.
See this wikipedia link: http://en.wikipedia.org/wiki/HSV_color_space
and this one:
http://en.wikipedia.org/wiki/Color_progression
A workable summary: 'hue' is color, and is measured from 0 - 360. It wraps
around, so hue 0 is the same as hue 360. Look at the wikipedia article for
cool visualizations.
Saturation is how vivid the color is-saturation 0 means a greyscale
regardless of hue. It is measured from 0-100%
Brightness is how, well, Bright the color is.
Cheers,
Rich
On 4/20/07, Bryce Nesbitt <[EMAIL PROTECTED]> wrote:
I made my own set of color ramping pins for google maps. You can have
them also:
http://www.obviously.com/gis/pins/
They are not as distinct as I'd hoped, as a simple RGB color ramp. I
can't distinguish more than about 16 levels out of the 100 steps on each
pin. Is there a good reference on map coloring I can look at?
> From: "David William Bitner" < [EMAIL PROTECTED]>
> If you make a single icon in SVG, you could just write a script that
would
> change the color (just a set of numbers in the xml) for the fill color
for
> the icons.
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Rich Gibson
Chief Scientist (and bottle washer), Locative Technologies
http://mappinghacks.com
http://geocoder.us
http://testingrange.com
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