calculate km from source to destination using lat n long

Question

I want calculate distance in km from source to destination using latitude and longitude in mvc Please help me

Manoj Bhoir · Answer

The GeoCoordinate class (.NET Framework 4 and higher) already has GetDistanceTo method. var sCoord = new GeoCoordinate(sLatitude, sLongitude); var eCoord = new GeoCoordinate(eLatitude, eLongitude); return sCoord.GetDistanceTo(eCoord); The distance is in meters. You need to reference System.Device.

Amit Kumar · Answer

Hi, You can do it in many ways. You should enter log and lat then you can get your output. using System; private double distance( double lat1, double lon1, double lat2, double lon2, char unit) { if ((lat1 == lat2) && (lon1 == lon2)) { return 0; } else { double theta = lon1 - lon2; double dist = Math.Sin(deg2rad(lat1)) * Math.Sin(deg2rad(lat2)) + Math.Cos(deg2rad(lat1)) * Math.Cos(deg2rad(lat2)) * Math.Cos(deg2rad(theta)); dist = Math.Acos(dist); dist = rad2deg(dist); dist = dist * 60 * 1.1515; if (unit == 'K' ) { dist = dist * 1.609344; } return (dist); } } This function converts decimal degrees to radians private double deg2rad( double deg) { return (deg * Math.PI / 180.0); } This function converts radians to decimal degrees private double rad2deg( double rad) { return (rad / Math.PI * 180.0); } For more detail go through the below link. https://www.aspforums.net/Threads/908679/Find-distance-between-two-Latitude-and-Longitude-value-using-C-and-VBNet-in-Windows-Forms-Application/ https://limzhenghong.wordpress.com/2013/11/04/calculate-distance-between-two-locations-with-latitude-and-longitude-c/ http://danielsaidi.com/blog/2011/02/04/calculate-distance-and-bearing-between-two-positions