CODEWITHSUNDEEP
javagoogle-mapsgoogle-maps-api-3
Piraba
Piraba

Reputation: 7014

Google Maps overview_polyline give wrong value

My application is java google map web application. Get 2 points and send to Google http://maps.googleapis.com/maps/api/directions/json?origin="+saddr+"&destination="+daddr+"&sensor=false , it give json. Then I have decodeoverview_polyline . My Problem is sometime it give extended value.

This is my decode part.

  public static ArrayList<Location> decodePoly(String encoded) {
      ArrayList<Location> poly = new ArrayList<Location>();
      int index = 0, len = encoded.length();
      int lat = 0, lng = 0;
      while (index < len) {
       int b, shift = 0, result = 0;
       do {
        b = encoded.charAt(index++) - 63;
        result |= (b & 0x1f) << shift;
        shift += 5;
       } while (b >= 0x20);
       int dlat = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
       lat += dlat;
       shift = 0;
       result = 0;
       do {
        b = encoded.charAt(index++) - 63;
        result |= (b & 0x1f) << shift;
        shift += 5;
       } while (b >= 0x20);
       int dlng = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
       lng += dlng;
       Location p = new Location((((double) lat / 1E5)),
         (((double) lng / 1E5)));

     //  System.out.println("==p==" +p.getLatitude());
      // System.out.println("==p==" +p.getLongitude());
       poly.add(p);
      }
      return poly;
     }

enter image description here

The black color mark , the rep didn't travel to that path. But it drawn like that. http://maps.googleapis.com/maps/api/directions/json?origin=6.95522,79.8864&destination=6.96165,79.8958&sensor=false This overview_polyline is _pmi@}xqfNEkEM{@DREUOc@Wi@MOkBmCi@k@o@o@gA}@qD_DiDgD{MoN_DeDJEVGvBS

this 2nd wrong path drawnenter image description here

This is my db sample data... enter image description here

Please give some idea? What is an issue?

Thanks in advance.

Upvotes: 1

Views: 1197

Answers (1)

Aballano
Aballano

Reputation: 1037

Probably this is just an error for the smooth applied to the points, as described in the documentation:

overview_polyline contains an object holding an array of encoded points that represent an approximate (smoothed) path of the resulting directions.

I actually saw how my path is drawed twice, so the last point connects with the first one, making a close path.

I guess that this element in the call output is just for a far-zoom use or something similar.

However, you can still parse the rest of the content as described in this post.

Upvotes: 1

Related Questions