calculate km from source to destination using lat n long

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

2 Replies

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Manoj Bhoir7y ago
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 Kumar7y ago
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