Thread: Calculating distance between two points, using latitude longitude?

Replies:
1

Last Post:
Jul 27, 2015 1:27 PM
Last Post By: bernard roussely



Posts:
5
Registered:
7/30/15


I am trying to calculate distance between two points using java code, I have written a code but it is not working. I have checked various forums to get the resolution to my query. I have found [java questions and answers]( http://findnerd.com/askquestion/java) specifically posted on this forum and hope I'll get a solution from the member of this community.
Here is code
final double RADIUS = 6371.01;
double temp = Math.cos(Math.toRadians(latA))
* Math.cos(Math.toRadians(latB))
* Math.cos(Math.toRadians((latB)  (latA)))
+ Math.sin(Math.toRadians(latA))
* Math.sin(Math.toRadians(latB));
return temp * RADIUS * Math.PI / 180;



Posts:
106
Registered:
2/8/05


Hello,
This web site has all the formulas: http://www.movabletype.co.uk/scripts/latlong.html
I have done this on Android in C++ :
float __fastcall TWhateverForm::ComputeDistance(TLocationCoord2D A, TLocationCoord2D B)
{
const int R = 6371000; // metres
float phi_1 = DegToRad((const float)A.Latitude);
float phi_2 = DegToRad((const float)B.Latitude);
float delta_phi = DegToRad((const float)(B.Latitude  A.Latitude));
float delta_lambda = DegToRad((const float)(B.Longitude  A.Longitude));
float arc = sin(delta_phi/2) * sin(delta_phi/2) + cos(phi_1) * cos(phi_2) * sin(delta_lambda/2) * sin(delta_lambda/2);
float angle = 2 * atan2(sqrt(arc), sqrt(1  arc));
return (R * angle);
}
Regards,
bernard




Legend


Helpful Answer
(5 pts)


Correct Answer
(10 pts)


Connect with Us