I am building application where i am getting the user\'s latitude
and longitude
using the below code
Considering that a latitude and longitude is a specific point, you cannot convert this directly to kilometers, which is a distance i.e. the length separating two points.
But you can get the distance between two coordinates (lat+long) with a math formula. I am not really good at math, but you could find such formula with a simple search on Google: here is the first result
You may also find something useful on this topic: How to convert latitude or longitude to meters?
This Script is usefull for you, but its in php
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;
}
}
Function to use
echo distance(32.9697, -96.80322, 29.46786, -98.53506, "M") . " Miles<br>";
echo distance(32.9697, -96.80322, 29.46786, -98.53506, "K") . " Kilometers<br>";
echo distance(32.9697, -96.80322, 29.46786, -98.53506, "N") . " Nautical Miles<br>";
What you're looking for is called the Haversine formula; there's a PHP implementation here.