[OpenLayers-Users] Zoom to filtered feature

[Ravi Pavuluri]

Michal,

You can try making Ajax call for WFS using a general ajax function or make use 
of OpenLayers.loadURL or similar ones.

I work mainly with Geoserver and in order to get bounds, you will have  to turn 
on the "return bounding box for every feature" in the WFS  settings.
 
A sample WFS for Geoserver
http://MyServer/geoserver/wfs?request=GetFeature&version=1.1.0&typeName=topp:states&propertyName=STATE_NAME,PERSONS&MAXFEATURES=1


A sample working WFS for MapServer 
http://demo.mapserver.org/cgi-bin/wfs?SERVICE=WFS&VERSION=1.0.0&REQUEST=getfeature&TYPENAME=continents&MAXFEATURES=1


Parse the output from the XML of Ajax call. Look for <gml:boundedBy> tag if you 
are just zooming to the bounds. You will have to look at <Geometry> or <geom> 
tag and build you own feature out of the coordinates and overlay it. 


May be someone has a better way of doing this.

-Ravi.
  





________________________________
From: Michał Średnicki <michsred at gmail.com>
To: Ravi Pavuluri <ravitheja at ymail.com>
Cc: users at openlayers.org
Sent: Fri, March 11, 2011 9:58:25 AM
Subject: Re: [OpenLayers-Users] Zoom to filtered feature

Thank you Ravi. The parcel layer is served also  via WFS but I don't have much 
experience with dealing with WFS layers in OpenLayers. Can you say something 
more about this method of receiving feature bounds in Open Layers?

Regards,

Michal


2011/3/11 Ravi Pavuluri <ravitheja at ymail.com>

Michal,
>
>I am not sure if this answers your question completely. You can try using WFS 
>which can get the boundary of your feature of interest and then you can code for 
>zooming to those bounds.
>
>-Ravi. 
>
>
>
>
________________________________
From: michsred <michsred at gmail.com>
>To: users at openlayers.org
>Sent: Fri, March 11, 2011 3:58:47 AM
>Subject: [OpenLayers-Users] Zoom to filtered feature
>
>
>Hi list,
>
>is there possible  to perform automatical zoom to feature filtered by CQL
>filter?
>
>I have a WMS layer containig parcels and I want to enable some kind of
>searching mechanism where user will put parcel number to a form and after
>apply it the only searched parcel will be displayed and map view will be set
>to this parcel's bounds.
>
>I enabled CQL filtering like this:
>
>                function updateFilter(){
>                if(pureCoverage)
>                  return;
>            
>                var filter = "parcel_number = " +
>document.getElementById('filter').value;
>                            
>                var  filterParams = {
>                    cql_filter: filter
>                };
>              
>                mergeNewParams(filterParams);
>            }
>            
>            function mergeNewParams(params){
>                myLayer.mergeNewParams(params);
>            }
>
>and after I put parcel number to a form connected with updateFilter()
>function and apply it, the only searched parcel is dispayed. My question is
>what should I do to enable zooming to the filtered parcel? Is it possible to
>retrieve BBOX of a particular feature from WMS layer and then use it in JS?
>
>Thank you in advance  for any suggestions!
>
>Michal
>
>--
>View this message in context: 
>http://osgeo-org.1803224.n2.nabble.com/Zoom-to-filtered-feature-tp6160737p6160737.html
>
>Sent from the OpenLayers Users mailing list archive at Nabble.com.
>_______________________________________________
>Users mailing list
>Users at lists.osgeo.org
>http://lists.osgeo.org/mailman/listinfo/openlayers-users
>
>


-- 
Michał Średnicki


      
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/openlayers-users/attachments/20110312/3f85486d/attachment.html