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Message from discussion library to plot counties on Google maps by color map based on scalar value?
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Josh Tauberer  
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 More options Sep 3 2009, 9:42 am
From: Josh Tauberer <taube...@govtrack.us>
Date: Thu, 03 Sep 2009 09:42:10 -0400
Local: Thurs, Sep 3 2009 9:42 am
Subject: Re: [sunlightlabs] library to plot counties on Google maps by color map based on scalar value?
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I started a project a few years ago to create an API for this purpose:
http://www.govtrack.us/perl/wms/

But I haven't had time to develop it beyond what I need to run my
district maps on GovTrack.

It provides a map overlay for any Google Maps API map. The advantage
over KML --- as I understand how Google uses KML --- is that it allows
for very high precision map boundaries that would otherwise make a KML
file too large to use with Google. But maybe that's changed.

It's open source. I'd love help fleshing it out into a more usable form.

- Josh Tauberer
- GovTrack.us

http://razor.occams.info

"Yields falsehood when preceded by its quotation!  Yields
falsehood when preceded by its quotation!" Achilles to
Tortoise (in "Godel, Escher, Bach" by Douglas Hofstadter)

On 09/03/2009 09:32 AM, Raymond Yee wrote:

> Hi everyone,

> I would like to display US counties on a Google map based on some
> scalar value (e.g., population)  for each county and a color map that
> associates values to colors.  Does anyone know of a library that makes
> this easy to do?  (I'm interested in doing the same for other
> adminstrative regions, such as zip codes and congressional districts.)

> (http://groups.google.com/group/Google-Maps-API/browse_frm/thread/
> fbc9266d4144e8fd/dbf74647b8baf8d1 contains a good discussion of the
> topic -- and I have found other references that might be helpful,  but
> I have not seen the functionality I'm looking for distilled down into
> an easy-to-use library.)

> Thanks,
> -Raymond


 
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