On Sep 11, 2008, at 11:19 AM, tedd wrote:
At 5:37 PM +0100 9/1/08, Colin Guthrie wrote:
Tom Chubb wrote:
That's all way above my head, but I think I'll be able to
understand it
after a strong coffee!
I should point out that this is really just trig and is only an
approximate distance as the crow flies. Not even sure if it takes
the curvature of the earth into consideration, but it's probably
"good enough" for most things.
Oh, I forgot to add -- I use it for this:
http://php1.net/b/zipcode/
This plugs into a zip code dB that has the center of the zip code in
lats and longs.
Cheers,
tedd
In regards to your php1.net/b/zipcode/ ... I think I may have found a
bug :) zipcode 49422 does not show up as being within 10 miles of
49424 even though 49423 does. FYI, 49422 is the zipcode for holland,
mi PO BOXES so I'm not sure if your database has that included or
not... Or where they would even register the lat/lon... I would
assume at the holland post office.. but I could be wrong.
--
Jason Pruim
Raoset Inc.
Technology Manager
MQC Specialist
11287 James St
Holland, MI 49424
www.raoset.com
japruim@xxxxxxxxxx
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