Re: Latitude, Longitude, and Radius


"George Hutto" <yougott@xxxxxxxxxxxxx> wrote in message
news:eACmVwGlFHA.2180@xxxxxxxxxxxxxxxxxxxxxxx

> I've got a database with Zip codes. This also includes the latitude and
> longitude values stored as singles (lat 42.17444, long -70.88417). I've
> been given the task of when a user enters a zip value, it will also
> display
> all other zip codes within a 25 mile radius.
>
> Does anyone know the correlation between latitude/longitude values and
> miles?

Search Google for the keywords "great circle formula".


.

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