Distance between two GPS points not working

Hi, I need to measure the distance between two locations (GPS coordinates)
I found the the following math here: math - Calculate distance between 2 GPS coordinates - Stack Overflow

function degreesToRadians(degrees) {
  return degrees * Math.PI / 180;

function distanceInKmBetweenEarthCoordinates(lat1, lon1, lat2, lon2) {
  var earthRadiusKm = 6371;

  var dLat = degreesToRadians(lat2-lat1);
  var dLon = degreesToRadians(lon2-lon1);

  lat1 = degreesToRadians(lat1);
  lat2 = degreesToRadians(lat2);

  var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
          Math.sin(dLon/2) * Math.sin(dLon/2) * Math.cos(lat1) * Math.cos(lat2); 
  var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 
  return earthRadiusKm * c;

And I “imported” the idea to Kodular as follow:

But when I run, the distance does not match.
I tested the suggested values for lat/long,lat1/long1 and also other coordinates but no good.
I checked the math a number of times and cannot find where I did wrong.

I did create a variable “b” just to make the blocks more readable but it does not change the result.

Help welcome
Thanks in advance


I like that you are trying to build the procedure. @vknow360 also made a extension to calculate this.


Dear Peter, just tested, works 100%.


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