Posted by Richard Lynch on 10/03/98 11:05

symbulos partners wrote:
>> So often php-general is graced with the presence of people with
>> multiple personalities.. or are you really the borg? :)
>
> What??

You used "we" a lot in your post.

>>> Any body has any experience with anything similar?
>>
>> I coded a zip code to distance calculater last week.
>>
>> x = 69.1 * ( zip2.lat - zip1.lat )
>> y = 69.1 * ( zip2.lon - zip1.lon ) * cos( zip1.lat / 57.3 )
>> miles = sqrt( x^2 + y^2 )
>>
>> This does not take into account the curve of the earth. In addition
>> you'll need a db with the latitude and longitude for each zip code.
>
> Does it work for UK postcodes? Where do you find UK post codes to latitude
> databases?

For KMS instead of miles, change 69.1 to, err, some other magic number.

Do the math. :-)

I don't know of any free UK databases. Yet. :-)


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