how calculate km distance using lat & long

Kalyani Shevale

7y1kLearn iOS Programming

I want km distance sing latitude and longitude in c#...

4 Replies

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Željko Perić7y ago
Hello, here is another version of distance calculation :
double Calculate_Distance(double long1,double long2,double lat1, double lat2)
{
// Result in Km
double distance = 0;
// Earth radius
const double R = 6372.795477598;
// Radians
double rad = Math.PI / 180;

double long1 *= rad;
double long2 *= rad;

double lat1 *= rad;
double lat2 *= rad;

distance  = R *
                      Math.Acos
                     (
                         Math.Sin(lat1)   *
                         Math.Sin(lat2)   +
                         Math.Cos(lat1)  *
                         Math.Cos(lat2)  *
                         Math.Cos(lon1- lon2)
                     );


return distance;
}
All the best,
Željko Peric
0
Kalyani Shevale7y ago
how to calculate using google api key?????
0
Amit Gupta7y ago
https://stackoverflow.com/questions/6366408/calculating-distance-between-two-latitude-and-longitude-geocoordinates
0
Madan Shekar7y ago
public static double DistanceTo(double lat1, double lon1, double lat2, double lon2, char unit = 'K')
{
double rlat1 = Math.PI*lat1/180;
double rlat2 = Math.PI*lat2/180;
double theta = lon1 - lon2;
double rtheta = Math.PI*theta/180;
double dist =
Math.Sin(rlat1)*Math.Sin(rlat2) + Math.Cos(rlat1)*
Math.Cos(rlat2)*Math.Cos(rtheta);
dist = Math.Acos(dist);
dist = dist*180/Math.PI;
dist = dist*60*1.1515;
switch (unit)
{
case 'K': //Kilometers -> default
return dist*1.609344;
case 'N': //Nautical Miles
return dist*0.8684;
case 'M': //Miles
return dist;
}
return dist;
}

If it helps mark as answer.
+2