<div>Hi, I'm working with Vector layer and I have a big amount of data to process; the problem is that the browser crashes while trying to load all this data. I'm using a rule based Style with a MaxScaleDenominator, under the assumption that the data will be loaded on demand depending on the zoom level. But unfortunately OL makes the WFS request to retrieve ALL Data, instead of only the data I need. In conclusion: is there an OpenLayers strategy to load only the data needed for the zoom level I am using? It would have to be some kind of on demand loading, depending of the Max and Min ScaleDenominator; instead of retrieving all features and filtering in client. Thanks.</div>
<div><br></div><div>Heres is a code snippet.</div><div><br></div><div><div>var paradas_wfs = new OpenLayers.Layer.Vector(</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>"paradas_vector",</div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>{</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>styleMap: getRuleBasedStyleMap(),</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>reportError: true,<span class="Apple-tab-span" style="white-space:pre"> </span></div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>strategies : [ new OpenLayers.Strategy.BBOX()],</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>projection : new OpenLayers.Projection("EPSG:900913"),</div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>protocol : new OpenLayers.Protocol.WFS(</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>{</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>version : "1.1.0",</div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>srsName : "EPSG:900913",</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>url : geoserverWFSURL,</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>featureType : featureType,</div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>featureNS : "<a href="http://www.imm.gub.uy">http://www.imm.gub.uy</a>",</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>featurePrefix : "imm",</div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>geometryName : "the_geom",</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>schema : geoserverWFSURL</div><div>
<span class="Apple-tab-span" style="white-space:pre"> </span>+ "?service=WFS&version=1.1.0&request=DescribeFeatureType&TypeName="</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>+ typeName </div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>})</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>});</div></div>