Compute the distance between two coordinates

computeDistance.js

function computeDistance(startCoords, destCoords) {
  var startLatRads = degreesToRadians(startCoords.latitude); 
  var startLongRads = degreesToRadians(startCoords.longitude); 
  var destLatRads = degreesToRadians(destCoords.latitude); 
  var destLongRads = degreesToRadians(destCoords.longitude);
  
  var Radius = 6371; // radius of the Earth in km
  var distance = 
    Math.acos(Math.sin(startLatRads) * Math.sin(destLatRads) +
    Math.cos(startLatRads) * Math.cos(destLatRads) * 
    Math.cos(startLongRads - destLongRads)) * Radius;
  return distance; 
}

function degreesToRadians(degrees) {
  var radians = (degrees * Math.PI)/180;
  return radians; 
}