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Posted by MS on 05/17/06 02:18
Thanks NC
Worked a treat.
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"NC" <nc@iname.com> wrote in message
news:1146756304.466009.320340@y43g2000cwc.googlegroups.com...
> MS wrote:
> >
> > I am looking for a geoclass, which initially will return a distance
> > between point A & B referenced by Lat & Lon
>
> You don't need a class for that. Here's the computation in its
> entirety:
>
> $distance = $r * acos(cos($lat1) * cos($lon1) * cos($lat2) * cos($lon2)
> +
> cos($lat1) * sin($lon1) * cos($lat2) * sin($lon2)
> +
> sin($lat1) * sin($lat2));
>
> where:
>
> $r -- radius of the Earth
> $lat1 -- latitude of point 1 in radians
> $lon1 -- longitude of point 1 in radians
> $lat2 -- latitude of point 2 in radians
> $lon2 -- longitude of point 2 in radians
>
> Cheers,
> NC
>
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