Find Distance By Latitude And Longitude?
Nov 13, 2010
i am trying to find distance by latitude and longtitude by using this formula mentioned in this site.
[URL]
every thing is Ok there when i do it by calculator but when i started doing it by programmatically there is a diiference in result.
here is my part of code
lat = Convert.ToDouble( (s3[a]));
longt =Convert.ToDouble( (s4[a]));
Avg_lat = pc._Latitude - lat;
Avg_longt = pc._Longitude - longt;
a_hold =( Math.Sin(Avg_lat / 2) * Math.Sin(Avg_lat / 2) )+ (Math.Cos(pc._Latitude) * Math.Cos(lat)) * (Math.Sin(Avg_longt / 2) * Math.Sin(Avg_longt / 2));
c_hold = 2 * Math.Atan2(Math.Sqrt(a_hold), Math.Sqrt(1 - a_hold));
// c_hold = (c_hold * 180) / 3.12;
distance = 6371 * c_hold;
the problem is Math funcation here calculate the things in radian i want it in degree. so i just found a formula to convert radian into degree but that formula does'nt convert the calculation correctly..
what to do bcoz there is'nt any other option to convert radian into degree..
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