How to convert Vector Layer coordinates into Map Latitude and Longitude in Openlayers

I'm pretty confused. I have a point:

x= -12669114.702301
y= 5561132.6760608

That I got from drawing a square on a vector layer with the DrawFeature controller.

The numbers seem...erm...awfull large, but they seem to work, because if I later draw a square with all the same points, it's in the same position, so I figure they have to be right.

The problem is when I try to convert this point to latitude and longitude.

I'm using:

map.getLonLatFromPixel(pointToPixel(points[0]));

Where points[0] is a geometry Point, and the pointToPixel function takes any point and turns it into a pixel (since the getLonLatFromPixel needs a 开发者_如何学Gopixel). It does this by simply taking the point's x, and making it the pixels x, and so on.

The latitude and longitude I get is on the order of:

lat: -54402718463.864
lng: -18771380.353223

This is very clearly wrong. I'm left really confused. I try projecting this object, using:

.transform(new OpenLayers.Projection("EPSG:4326"), map.getProjectionObject());

But I don't really get it and am pretty sure I did it incorrectly, anyways.

My code is here: http://pastie.org/909644

I'm sort of at a loss. The coordinates seem consistent, because I can reuse them to get the same result...but they seem way larger than any of the examples I'm seeing on the openLayers website...

According to your code, the projection you are using is EPSG:900913, which is the one that Google uses. The units for this projection are meters, and the values that you obtain for the point are perfectly correct:

x= -12669114.702301 (longitude)
y= 5561132.6760608 (latitude)

This values are not pixels but coordinates in the EPSG:900913 projection, and are correct (as long as they are supposed to be in Idaho, if not there is something wrong elsewhere)

To check it, you can go to http://proj4js.org/ and transform your coordinates from EPSG:900913 to WGS84 (lat/lon), which will give you:

x = -113.8085937334033 (longitude)
y = 44.615123313472 (latitude)

This are the values you are probably expecting. If you want to obtain them from the point coordinates use something like:

point.transform(new OpenLayers.Projection("EPSG:900913"), new OpenLayers.Projection("EPSG:4326"));

This will transform the coordinates from the Google projection to WGS84 (Latitude / Longitude).

As far as I remember, box handler is implementy differently from other handlers in OL. We had to implement an own handler which returns a geometry with lon/lat coordinates rather that with pixel coordinates:

Legato.Handler.Box = OpenLayers.Class(OpenLayers.Handler.Box, {
  endBox : function(end) {
    var result;
    if (Math.abs(this.dragHandler.start.x - end.x) > 5
        || Math.abs(this.dragHandler.start.y - end.y) > 5) {
      var start = this.dragHandler.start;
      var top = Math.min(start.y, end.y);
      var bottom = Math.max(start.y, end.y);
      var left = Math.min(start.x, end.x);
      var right = Math.max(start.x, end.x);

      var lowerLeftLonLat = this.map.getLonLatFromPixel(new OpenLayers.Pixel(
          left, bottom));
      var upperRightLonLat = this.map.getLonLatFromPixel(new OpenLayers.Pixel(
          right, top));
      var bounds = new OpenLayers.Bounds(lowerLeftLonLat.lon,
          lowerLeftLonLat.lat, upperRightLonLat.lon, upperRightLonLat.lat);
      result = bounds.toGeometry();
    } else {
      var xy = this.dragHandler.start.clone();
      var lonLat = this.map.getLonLatFromPixel(xy);
      result = new OpenLayers.Geometry.Point(lonLat.lon, lonLat.lat);
    }
    this.removeBox();
    this.callback("done", [ result ]);
  },

  CLASS_NAME :"Legato.Handler.Box"
});