Re: [OpenLayers-Users] Conversion of BBox for GetFeature Request

[Jerome A. Wendell]

Gery,

 

Thanks for the information.  I really appreciate your help.

 

Jerome

 

 

From: Gery . [mailto:gameji...@hotmail.com] 
Sent: Wednesday, March 06, 2013 2:38 AM
To: jawend...@digitalmapping.com
Cc: OpenLayers User List
Subject: Re: [OpenLayers-Users] Conversion of BBox for GetFeature Request

 

It should work using the code below, I did the same (thanks to Greg and Arnd 
tips), I'm working from memory here but both var should go inside the 
Openlayers.class

Sent from my iBath


On Mar 6, 2013, at 4:52, "Jerome A. Wendell" <jawend...@digitalmapping.com> 
wrote:

I failed to add the following to my previous post:

 

var geographic = new OpenLayers.Projection("EPSG:4326");

var mercator = new OpenLayers.Projection("EPSG:900913");

 

Thanks.

 

 

From: openlayers-users-boun...@lists.osgeo.org 
[mailto:openlayers-users-boun...@lists.osgeo.org] On Behalf Of Jerome A. Wendell
Sent: Tuesday, March 05, 2013 9:37 PM
To: OpenLayers User List
Subject: [OpenLayers-Users] Conversion of BBox for GetFeature Request

 

I read several posts on this topic, and have attempted to convert the 
coordinates of the BBox from 900913 to 4326, which is the system for the layer 
the GetFeature request is posted for.  The request is still being sent in 
900913 coordinates, and no features are being returned.  I am new to 
OpenLayers, and I have probably interpreted the information in the posts and 
the documentation incorrectly.  Any suggestions that you may have concerning 
what I am doing wrong are greatly appreciated.  The code that I am using is 
below:

 

OpenLayers.Control.myGetFeature = 
OpenLayers.Class(OpenLayers.Control.GetFeature,{

                                                               selectBox: 
function(position){

                                                                               
var newbounds = new 
OpenLayers.Control.GetFeature.prototype.selectBox.apply(this, 
transform(mercator,geographic).toBBox(null,mybaselayer.reverseAxisOrder()));

                                                                               
this.request(newbounds);

                                                               },

                                                    CLASS_NAME: 
'OpenLayers.Control.myGetFeature'

                                });

 

        var myControl = new OpenLayers.Control.myGetFeature({

            protocol: OpenLayers.Protocol.WFS.fromWMSLayer(mylayer),

                                box: false,

                                hover: false,

                                maxFeatures: 20

                });

 

                myControl.events.register("featureselected", this, function(e) {

                                highlightLayer.addFeatures(e.features);

                });

 

                myControl.events.register("featureunselected", this, 
function(e) {

                                highlightLayer.removeFeatures(e.features);

                });

 

                map.addControl(myControl);

                myControl.activate();

 

Thanks in advance for your help.

 

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