Hi Marish,
This may be better suited to the OpenLayers list. From what I'm reading it
looks like the issue isn't GeoServer but OL.
http://trac.osgeo.org/openlayers/wiki/MailingLists
Jonathan
On 24 January 2013 16:36, <[email protected]> wrote:
> ** **
>
> need technical help/ guidance on OpenLayers. We’re stuck with following
> technical issue and seeking technical help/ advice for resolving the same.
> ****
>
> * *
>
> **· **We are using Wms services (layers published via Geoserver),
> to display point, line and polygon features onto the map.****
>
> We are using the OpenLayers property “new OpenLayers.Layer.WMS()”, for
> displaying the layers.****
>
> ** **
>
> **· **However, the problem that we are facing is in using
> OpenLayers.Control.GetFeature
> control. We have to perform a selection using BBox(drag box) and have used
> ****
>
> the following code:****
>
> ** **
>
> control_select = new OpenLayers.Control.GetFeature({****
>
> protocol: OpenLayers.Protocol.WFS.fromWMSLayer(layerName),****
>
> box: true,****
>
> hover: true,****
>
> multipleKey: "shiftKey",****
>
> toggleKey: "ctrlKey"****
>
> });****
>
> This control is then added to the map.****
>
> ** **
>
> **· **The point feature selection works perfectly but when we
> select just one line feature, it happens to select many line features
> (sometimes more than 30 line features!).****
>
> Most of the lines are not even close or connected to the selected line
> feature!****
>
> We are using the "featureselected" event to capture the selection made by
> the drag box. ****
>
> Syntax:- “control_select.events.register("featureselected", this, function(e)
> {}“****
>
> ** **
>
> **· **We tried to debug OpenLayers.js. It has a predefined set of
> Geometry types:****
>
> var order=["MultiPolygon","Polygon","MultiLineString","LineString",
> "MultiPoint","Point","Envelope"]****
>
> We have a table (for the line feature), that has a shape field as
> Multiline, which is then converted to Oracle Spatial format and then web
> services are created.****
>
> After the drag box is created, Openlayers identifies the selected feature
> as “MultiLineString” and somehow relates many other line features to create
> a tree structure.****
>
> It forms one parent node and this node has a nextSibling, which is another
> line feature. In this way, it creates a hierarchy of “nextSibling” for
> every previous Sibling, thus ****
>
> selecting a huge range of line features!****
>
> ** **
>
> **· **There is an array called “features” created by OpenLayers,
> where it pushes all the obtained features from the node:- “
> obj.features.push(feature);”****
>
> Depending on the length of the array, “featureselected” event is fired
> that many times thus returning all the features instead of only the
> selected ones.****
>
> ** **
>
> ** **
>
> *Regards*,
> Manish Barapatre ****
>
> Office: 01473 650516****
>
> ** **
>
>
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