[closed] How to get the bounding box for a center point in OpenStreet maps through Javascript API?

Question

Like Google maps have functions like getBounds (), getNorthEast (), and getSouthWest () for finding the corners in a viewport, do OpenStreet maps have anything similar?

Question: How to get the bounding box for a center point in OpenStreet maps through Javascript API?

Is this link of some relevance here?
http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Tile_bounding_box

From that link:

class BoundingBox {
    double north;
    double south;
    double east;
    double west;   
  }
  BoundingBox tile2boundingBox(final int x, final int y, final int zoom) {
    BoundingBox bb = new BoundingBox();
    bb.north = tile2lat(y, zoom);
    bb.south = tile2lat(y + 1, zoom);
    bb.west = tile2lon(x, zoom);
    bb.east = tile2lon(x + 1, zoom);
    return bb;
  }

  static double tile2lon(int x, int z) {
     return x / Math.pow(2.0, z) * 360.0 - 180;
  }

  static double tile2lat(int y, int z) {
    double n = Math.PI - (2.0 * Math.PI * y) / Math.pow(2.0, z);
    return Math.toDegrees(Math.atan(Math.sinh(n)));
  }

In this code, what are the north east and south west coordinates?

Accepted Answer

2

As OpenStreetMap is only a dataset it does not have those functions. You would have to look at javascript libraries for slippy maps like OpenLayers or Leaflet for that.

permanent link

answered 04 Oct '12, 12:38

Gnonthgol ♦
13.8k●16●103●198
accept rate: 16%

And you might want to start looking here.

(04 Oct '12, 14:19) SomeoneElse ♦

Gnonthgol, I have found your leaflet link helpful. I am using that API now. Thanks to @SomeonElse too.

(05 Oct '12, 12:23) Anisha Kaul

[closed] How to get the bounding box for a center point in OpenStreet maps through Javascript API?

The question has been closed for the following reason "Question is off-topic or not relevant" by SomeoneElse 04 Oct '12, 14:20

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