[OpenLayers-Users] BBOX update fails when moving the map (since update from OL 2.10 to OL 2.11)

[Eric Lemoine]

On Tuesday, December 27, 2011, rscxdev <rscxdev at gmx.de> wrote:
> Hello
>
> i'm struggling a few hours now with the following problem:
>
> I use a vector layer + BBOX strategy to get features when panning/zooming
> the map:
>
>
> var prot = new OpenLayers.Protocol.HTTP({
>                        url: getfeat_url,
>                        readWithPOST: true,
>                        params: {
>
>                                ... (a few parameters for the request)
>
>                        },
>                        format: new JSON({
>                                'internalProjection': new
OpenLayers.Projection("EPSG:900913"),
>                                'externalProjection': new
OpenLayers.Projection("EPSG:4326")
>                        })
>
>                    });
>
> var feat_layer = new OpenLayers.Layer.Vector("Features", {
>                strategies: [new OL_BBOX({resFactor: 1.1})],
>                protocol: prot,
>                styleMap: styleMap
>
>                   });
>
> var osm_layer = new OpenLayers.Layer.OSM.Mapnik("Mapnik");
> map.addLayers([osm_layer, feat_layer]);
>
> (standard code which you can find in examples)
>
> I used this code in openlayers 2.10 and all was fine.
> Now i changed to openlayers 2.11 and all is working fine except for
features
> that aren't loaded when moving the map.
> But
> - if i set visibility of the feature layer to false, then to true, the
> features are loaded.
> - if i zoomed in/out, the features are loaded.
> Only, when i move the map, no feature is loaded (there's no HTTP request
> resp.).
>
> I read other posts concerning similar problems and therefore tried to set
> ratio (in BBOX class) to 1, to 1.4, to 1.8, but the problem remained. Also
> changing the maxfeatures parameter of the HTTP class didnt solve the
> problem.
>
> Could someone give me a hint how to solve this, please?

Hi

Any chance to view a live example demonstrating the problem?


-- 
Eric Lemoine

Camptocamp France SAS
Savoie Technolac, BP 352
73377 Le Bourget du Lac, Cedex

Tel : 00 33 4 79 44 44 96
Mail : eric.lemoine at camptocamp.com
http://www.camptocamp.com
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