How to get bbox from capabilities?

Question

I have WMS layer and want use zoomToExtent after CQL filter. So i gonna get bbox from geoserver.

wms = new OpenLayers.Format.WMSCapabilities();
OpenLayers.Request.GET({
url:"http://localhost:8080/geoserver/wms/filedata?request=GetCapabilities",
success: function(e){
var response = wms.read(e.responseText);
var capability = response.capability;
for (var i=0, len=capability.layers.length; i<len; i+=1) { 
var layerObj = capability.layers[i]; 
if (layerObj.name === 'filedata') { 
    map.zoomToExtent(OpenLayers.Bounds.fromArray(layerObj.llbbox)); 
    break; 
} 
}
}
});

But zoomToExtent dont wanna work with lon lat, so how to get bbox in meters? My map showed in epsg900913.

Answer 1

you should use transform method for getting your result in meters.

OpenLayers.Projection.transform = function( point,
    source,
    dest    )

Transform a point coordinate from one projection to another. Note that the input point is transformed in place.

Parameters

point {{OpenLayers.Geometry.Point> | Object} An object with x and y properties
representing coordinates in those dimensions.

sourceProj {OpenLayers.Projection} Source map coordinate system

destProj {OpenLayers.Projection} Destination map coordinate system

Example :

    var lonlat = new OpenLayers.LonLat(-3.57138, 39.8384);
    lonlat.transform(map.displayProjection, map.baseLayer.projection);
    map.setCenter(lonlat, 5);

i hope it helps you...