Google Maps API v3 port - google-maps-api-3

Question

I am trying to port my google api v2 to v3 but it does not work....i get an "Polyline is not defined" error... :/ the old Polyline is GPolyline and the new is new google.maps.Polyline
https://developers.google.com/maps/documentation/javascript/overlays?hl=de-DE#Polylines
var map = "";
var mapConfig = "";
var mapElements = "";
var curActiveMenuButton = "";
var clickHandlerElementCount = "";
//window.onload = function() {
//window.addEvent('domready', function() {
//document.addEvent('domready', function() {
//alert("The DOM is ready.");
//initializeMap();
//});
/*
* function initializeMap()
*
* Initalisierung der Google-Map.
*/
function initializeMap(){
// Karte ins DOM einhängen
map = new google.maps.Map($('map_canvas'), myOptions);
//place the map on the canvas
//map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
var latlng = new google.maps.LatLng(51.05758110879136, 10.451431274414062);
// default zoomlevel and center point
var myOptions = {
zoom: 12,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP,
navigationControl: true,
mapTypeControl: true,
scaleControl: true,
};
// default zoomlevel and center point
var encodedPolyline = new google.maps.Polyline();
// find bounding polyline and recalculate map center
for (var i = 0; i < mapElements.length; i++) {
if (mapElements[i]['titel'] == "nationalparkhainich") {
encodedPolyline = Polyline.fromEncoded({
points: mapElements[i]['pol'],
levels: mapElements[i]['lev']
});
mapCenter = encodedPolyline.getBounds().getCenter();
i = mapElements.length;
}
}
// Kartenmenue initialisieren
//initializeMapMenue();
}

Answer 1

Polyline is indeed not defined. You use it here:
encodedPolyline = Polyline.fromEncoded({
Version 3 doesn't include fromEncoded() — it appears that you need to use the geometry library (which needs to be explicitly loaded separately) and
encodedPolyline.setPath(
google.maps.geometry.encoding.decodePath(mapElements[i]['pol'])
);
[split on to separate lines here for clarity]