GoogleMaps Polyline Length in V3

Question

There doesn\'t seem to be a length funciton for the Polyline in Google Maps anymore in V3.

Has anyone found a workaround for this functionality gap?

Answer 1

here's the prototypes for the required function - hope this helps any further:

google.maps.Polygon.prototype.Distance = function() {
   var dist = 0;
   for (var i=1; i < this.getPath().getLength(); i++) {
      dist += this.getPath().getAt(i).distanceFrom(this.getPath().getAt(i-1));
   }
   return dist;
}

google.maps.LatLng.prototype.distanceFrom = function(newLatLng) {
    //var R = 6371; // km (change this constant to get miles)
    var R = 6378100; // meters
    var lat1 = this.lat();
    var lon1 = this.lng();
    var lat2 = newLatLng.lat();
    var lon2 = newLatLng.lng();
    var dLat = (lat2-lat1) * Math.PI / 180;
    var dLon = (lon2-lon1) * Math.PI / 180;
    var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
      Math.cos(lat1 * Math.PI / 180 ) * Math.cos(lat2 * Math.PI / 180 ) *
      Math.sin(dLon/2) * Math.sin(dLon/2);
    var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
    var d = R * c;
    return d;
}

source