title: Google Maps, array + GLatLng + GPolyline
body: <p>I am using the following code to group and show a list of ship positions on a map:</p>
  
  <pre><code>function configure_ship_polylines() {
  
      var shipPoints = new Array();
  
      // Group positions by ship
      for (var ScenarioPositionID in __data['scenarioPositions']) {
  
          var scenarioPosition = __data['scenarioPositions'][ScenarioPositionID];
          var key = "ShipID_" + scenarioPosition.ShipID;
  
          // Initialize if necessary
          if (shipPoints[key] == null) {
              shipPoints[key] = new Array();
          }
  
          var latLong = new GLatLng(scenarioPosition.Latitude, scenarioPosition.Longitude);
  
          // Append coordinates
          shipPoints[key].push(latLong);
      }
  
  
      // Loop through the grouped coordinates and add to map
      for (var key in shipPoints) {
  
          var points = shipPoints[key];
          var ShipID = key.substring(7);
  
          // Only add polygons with points.length &gt; 1
          if (points.length &gt; 1) {
  
              var shipPolyline = new GPolyline(points);
  
              //alert("Adding polyline: " + shipPolyline + " for ship: " + ShipID + " " + points + " " + typeof points);
  
              __mapItems['shipPolylines'][key] = shipPolyline;
  
              __map.addOverlay(shipPolyline);
  
          }
      }
  }
  </code></pre>
  
  <p>What happens is that only <em>one</em> of the polylines are displayed on the map. The rest are invisible or aren't added at all (I'm not quite sure how to debug google maps to find out). I have used firebug extensively over and over again to debug this, but everything seems fine. </p>
  
  <p>If I create polylines manually I can add them to the map and everything works fine. If I create markers on each point instead of polylines then the markers display fine at the correct places.</p>
  
  <p>I'm getting kinda pissed at this because I have almost spent a full work day trying to figure out what the hell is going on. Any ideas?</p>