degreesToRadians: function(degrees) {
            return degrees * Math.PI / 180;
        },
        radiansToDegrees : function (radians) {
            return radians * (180 / Math.PI);
        },
        angleFromCoordinate : function (lat1, long1, lat2, long2) {
            return this.methods.angleFromCoordinate2(lat1, long1, lat2, long2);
            lat1  = this.methods.degreesToRadians(lat1);
            lat2  = this.methods.degreesToRadians(lat2);
            long1 = this.methods.degreesToRadians(long1);
            long2 = this.methods.degreesToRadians(long2);
            var dLon = (long2 - long1);
            var y = Math.sin(dLon) * Math.cos(lat2);
            var x = Math.cos(lat1) * Math.sin(lat2) - Math.sin(lat1) * Math.cos(lat2) * Math.cos(dLon);
            var brng = Math.atan2(y, x);
            brng = this.methods.radiansToDegrees(brng);
            brng = (brng + 360) % 360;
            //brng = 360 - brng; // count degrees counter-clockwise - remove to make clockwise
            return brng;
        },

----
            var y = Math.sin(lon2-lon1) * Math.cos(lat2);
            var x = Math.cos(lat1)*Math.sin(lat2) - Math.sin(lat1)*Math.cos(lat2)*Math.cos(lon2-lon1);
            return Math.atan2(y, x) * 180 / Math.PI;