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@Devaanandhan
Created January 1, 2019 15:36
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Calculating between two distance from database
Hi, i am doing a tour planner web based. I try using this formula but i am having problem because in google map when i test this two location, it shows 11 min but when i use this, it showing me 200+ hours. Please do need some assistance
Here is my example code :
a_lat = '3.159583';
a_lon = '101.717955';
b_lat = '3.160384';
b_lon = '101.736396';
function getDistanceFromLatLonInKm(lat1,lon1,lat2,lon2) {
var R = 6371; // Radius of the earth in km
var dLat = deg2rad(lat2-lat1); // deg2rad below
var dLon = deg2rad(lon2-lon1);
var a =
Math.sin(dLat/2) * Math.sin(dLat/2) +
Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) *
Math.sin(dLon/2) * Math.sin(dLon/2)
;
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
var d = R * c; // Distance in km
return d;
}
function deg2rad(deg) {
return deg * (Math.PI/180)
}
distance = getDistanceFromLatLonInKm(a_lat, a_lon, b_lat, b_lon);
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