buglocfinder - Bugs: bug #3313, distance calc's are off

 
 

bug #3313: distance calc's are off

Submitted by:  Drew Ulricksen <Drew>
Submitted on:  Wed 23 Apr 2003 06:59:37 PM UTC  
 
Category: NoneSeverity: 3 - Normal
Item Group: NoneStatus: None
Privacy: PublicAssigned to: None
Open/Closed: Open

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Wed 23 Apr 2003 06:59:37 PM UTC, original submission:

example of corrected code

function distance($lat1, $lon1, $lat2, $lon2, $unit) {
$theta = $lon1 - $lon2;
$dist = sin(deg2rad($lat1)) * sin(deg2rad($lat2)) +
cos(deg2rad($lat1)) * cos(deg2rad($lat2)) *
cos(deg2rad($theta));
$dist = acos($dist);
$dist = rad2deg($dist);
$miles = $dist * 60 * 1.1515;
$unit = strtoupper($unit);
if ($unit == "K") {
return ($miles * 1.609344);
} else if ($unit == "N") {
return ($miles * 0.8684);
} else {
return $miles;
}
}
echo distance(-37.67587, 145.03985, -37.83204, 145.35123, "K") . "
Kilometers<br>";

Drew Ulricksen <Drew>
Project Member

 

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