>For that purpose I would think that Latitude and Longitude of the airport
>would provide a much better distance calculation than the Zip Code. In any
>case the Zip would have to be converted to a Latitude Longitude coordinate
>(or, at the very least something like it) to do the distance calculation.
>
>
>
>As somebody else said the location (coordinates) of a Zip code is taken from
>the mail processing center servicing that Zip Code. As far as I remember
>the location of an airport is taken from the position of the air-traffic
>control tower. The latter would almost always give you a better general
>measurement than that the former.
>
>
>
>Jim Davis
>
>
>
> _____
>
>From: Chunshen (Don) Li [mailto:[EMAIL PROTECTED]
>Sent: Friday, June 18, 2004 10:49 PM
>To: CF-Community
>Subject: Re: List of Airports and ZipCode?
>
>
>
>--BenD
>"This isn't exactly how zipcodes work."
>
>Actually it's my fault for not stating exactly how I want to use zipcode in
>relation to airport. I'm working a project that requires calculation of
>distance from airport dropoff (cab dropoff and passenger dropoff should not
>be too far off except real large airport) to a destination. But this is
>ball-park estimate, no mil precision required. Using zipcode for city of
>the airport won't do. Thanks.
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