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07.01.2008 at 12:08PM PDT, ID: 23531323
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8.0

Using Google Maps API to determine the driving distance between two locations

Asked by Ray_Paseur in PHP Scripting Language, Extensible Markup Language (XML), Extensible HTML (XHTML)

Tags: , ,

I would like to determine the driving distance between two locations.  I have a vague sense that I might be able to do this with Google Maps API.

I have used zipcode-based geolocation algorithms and determined that the distance between Washington, DC and Pittsburgh, PA is about 187 miles.  However these algorithms use great-circle computations and do not take into account the road mileage.  If you use Google Maps to get the driving distance you get 237.  In my experience, that is much closer   to reality.

http://maps.google.com/maps?f=d&hl=en&geocode=&saddr=20016&daddr=15222&sll=39.693615,-78.54249&sspn=1.608247,3.633728&ie=UTF8&z=9

Can anyone show me how to use the Google Maps API to get the driving distance (as opposed to the great circle distance)  between two zip codes?  

I am not worried about inaccuracies that will be sure to pop up in adjacent or nearby zip codes.  I would just like to reduce the 25% error that seems to come along with the geolocation algorithms once you get out about 100 miles or so.

Thanks to all. ~RayStart Free Trial
[+][-]07.01.2008 at 03:48PM PDT, ID: 21912232

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[+][-]07.01.2008 at 04:28PM PDT, ID: 21912400

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[+][-]07.01.2008 at 08:19PM PDT, ID: 21913186

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About this solution

Zones: PHP Scripting Language, Extensible Markup Language (XML), Extensible HTML (XHTML)
Tags: Google Maps API, XHTML, XML
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Solution Provided By: b0lsc0tt
Participating Experts: 2
Solution Grade: A
 
 
[+][-]07.01.2008 at 08:20PM PDT, ID: 21913190

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[+][-]07.01.2008 at 08:27PM PDT, ID: 21913216

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[+][-]07.08.2008 at 01:45PM PDT, ID: 21958072

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[+][-]07.08.2008 at 02:33PM PDT, ID: 21958492

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[+][-]07.08.2008 at 03:40PM PDT, ID: 21958967

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[+][-]07.08.2008 at 03:56PM PDT, ID: 21959123

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[+][-]07.08.2008 at 06:05PM PDT, ID: 21959784

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[+][-]07.08.2008 at 06:10PM PDT, ID: 21959808

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