Measure distance between lat/lon coordinates and utm coordinates

var R = 6371e3; // metres
var φ1 = lat1.toRadians();
var φ2 = lat2.toRadians();
var Δφ = (lat2-lat1).toRadians();
var Δλ = (lon2-lon1).toRadians();

var a = Math.sin(Δφ/2) * Math.sin(Δφ/2) +
        Math.cos(φ1) * Math.cos(φ2) *
        Math.sin(Δλ/2) * Math.sin(Δλ/2);
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));

var d = R * c;

DistV := abs(lat1-lat2);                  // Get a positive vertical value
DistH := abs(lon1-long2);                 // Get a positive horizontal    value
DistH := DistH * Cos((lat1+lat2) / 2);     // Use average latitude            
DistGPS := sqrt(sqr(DistV) + sqr(DistH)); // Get a diagonal value
DistMeters := DistGPS*111120;  //to meters