[OpenLayers-Users] How to use OpenLayers requesting WFS with Spatial Operations

[Myeong Hun Jeong]

Thanks Kris Geusebroek.

In my case, I loaded WMS building layer because WFS layer loading time is
big.
After loading WMS layer, I draw rectangle on the map.
After drawing rectangle, what I want to do is that
I want to get information for building features within the rectangle and
I also would like to select or highlight features within the rectangle.
What shoul I do?

Best regards,
Myeonghun Jeong.


2009/4/25 Myeong Hun Jeong <mhjeong74 at gmail.com>

> Hi Roald,
> There are two things I want to know.
> 1. How to send WFS requests to server with openlayers? I know the way to
> load WFS layers when I initialize map, but after loading layers, I don't
> know how to request WFS with Spatial Operations in OpenLayers.
>
> 2. I also want to know the way to display a WFS layer on my map that
> automatically requests the correct features within the BBOX of the viewport?
>
> Thanks in advance.
>
> Best Regrards,
> Myeonghun Jeong.
>
>
>
> 2009/4/25 Roald de Wit <roald.dewit at lisasoft.com>
>
> Hi Myeonghun Jeong,
>>
>> Can you explain what you try to do? Do you want to display a WFS layer on
>> your map that automatically requests the correct features within the BBOX of
>> the viewport or do you want to have control over what BBOX you send to the
>> WFS server and send your WFS 'manually'?
>>
>> Maybe it is good to have a look at some examples (type WFS in the search
>> box): [1].
>>
>> Regards, Roald
>>
>> [1] http://www.openlayers.org/dev/examples/
>>
>> Myeong Hun Jeong wrote:
>>
>>>
>>> Dear list.
>>>
>>> I want to know how to use openlayers when I request WFS with Spatial
>>> Operations.
>>>
>>> For example, at GeoServer Demo Request page, I can fin
>>> WFS_getFeatureBBox01.1.url and WFS_getFeatureBBox01.1.xml samples.
>>>
>>> So, the request is that
>>>
>>>
>>> http://localhost:8888/geoserver/wfs?request=GetFeature&version=1.0.0&typeName=topp:states&propertyName=STATE_NAME,PERSONS&BBOX=-75.102613,40.212597,-72.361859,41.512517<
>>> http://localhost:8888/geoserver/wfs?request=GetFeature&version=1.0.0&typeName=topp:states&propertyName=STATE_NAME,PERSONS&BBOX=-75.102613,40.212597,-72.361859,41.512517>
>>>
>>>
>>>
>>> or
>>>
>>> http://localhost:8888/geoserver/wfs
>>>
>>> <wfs:GetFeature service="WFS" version="1.1.0"
>>>
>>>  xmlns:topp="http://www.openplans.org/topp"
>>>
>>>  xmlns:wfs="http://www.opengis.net/wfs"
>>>
>>>  xmlns:ogc="http://www.opengis.net/ogc"
>>>
>>>  xmlns:gml="http://www.opengis.net/gml"
>>>
>>>  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>>>
>>>  xsi:schemaLocation="http://www.opengis.net/wfs
>>>
>>>                      http://schemas.opengis.net/wfs/1.1.0/wfs.xsd">
>>>
>>>  <wfs:Query typeName="topp:states">
>>>
>>>    <wfs:PropertyName>topp:STATE_NAME</wfs:PropertyName>
>>>
>>>    <wfs:PropertyName>topp:PERSONS</wfs:PropertyName>
>>>
>>>    <ogc:Filter>
>>>
>>>      <ogc:BBOX>
>>>
>>>        <ogc:PropertyName>the_geom</ogc:PropertyName>
>>>
>>>        <gml:Envelope srsName="
>>> http://www.opengis.net/gml/srs/epsg.xml#4326">
>>>
>>>           <gml:lowerCorner>-75.102613 40.212597</gml:lowerCorner>
>>>
>>>           <gml:upperCorner>-72.361859 41.512517</gml:upperCorner>
>>>
>>>        </gml:Envelope>
>>>
>>>      </ogc:BBOX>
>>>
>>>   </ogc:Filter>
>>>
>>>  </wfs:Query>
>>>
>>> </wfs:GetFeature>
>>>
>>>
>>> But when I use openlayers, how to request thses requests exactly?
>>>
>>> For instance, when I request GetFeatureInfo with openlayers.
>>>
>>> // support GetFeatureInfo
>>>
>>>            map.events.register('click', map, function (e) {
>>>
>>>                document.getElementById('nodelist').innerHTML =
>>> "Loading... please wait...";
>>>
>>>                var url =  map.layers[0].getFullRequestString(
>>>
>>>                    {
>>>
>>>                        REQUEST: "GetFeatureInfo",
>>>
>>>                        EXCEPTIONS: "application/vnd.ogc.se_xml",
>>>
>>>                        BBOX: map.getExtent().toBBOX(),
>>>
>>>                        X: e.xy.x,
>>>
>>>                        Y: e.xy.y,
>>>
>>>                        INFO_FORMAT: 'text/html',
>>>
>>>                        QUERY_LAYERS: map.layers[0].params.LAYERS,
>>>
>>>                        FEATURE_COUNT: 50,
>>>
>>>                        WIDTH: map.size.w,
>>>
>>>                        HEIGHT: map.size.h
>>>
>>>                    },
>>>
>>>                    "http://localhost:8888/geoserver/wms"
>>>
>>>                );
>>>
>>>                OpenLayers.loadURL(url, '', this, setHTML, setHTML);
>>>
>>>                OpenLayers.Event.stop(e);
>>>
>>>            });
>>>
>>>        }
>>>
>>>
>>>
>>> Please, give me a piece of information.
>>>
>>>
>>> Best regards,
>>>
>>> Myeonghun Jeong.
>>>
>>>
>>>
>>>
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/openlayers-users/attachments/20090427/64cbe872/attachment.html