Geotargeting (Synonyme: Geolocation/Geolokation) ordnet IP-Adressen, MAC-Adressen oder IPTC/XMP ihrer geographischen Herkunft zu. [...]Wikipedia

23NOV2007

Geocoordinates distance

A formula to calculate the distance of geocoordinates.

<?php
$lat1 = 46.2341938036161;
$lon1 = -63.124778021257015;

$lat2 = 46.4141938036161;
$lon2 = -63.118571124705284;

$distance = (3958*3.1415926*sqrt(($lat2-$lat1)*($lat2-$lat1) + cos($lat2/57.29578)*cos($lat1/57.29578)*($lon2-$lon1)*($lon2-$lon1))/180);

print($distance);
?>

see [1].
Here's some theory on that subject [2].

[1] http://agaricdesign.com/note/assigning-geographical-coordinates-drupal-c...

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