Hi, for own sld test purpose I have set up an example http://gis.ibbeck.de/OLClient/examples/wms_sld_world.asp which use SLD to render filtered items of a map. Arnd
_____ Von: users-boun...@openlayers.org [mailto:users-boun...@openlayers.org] Im Auftrag von steve.tout...@inspq.qc.ca Gesendet: Mittwoch, 6. Januar 2010 17:10 An: Andreas Hocevar Cc: users@openlayers.org; users-boun...@openlayers.org Betreff: Re: [OpenLayers-Users] geojson - Performance issue Thanks for this alternative Andreas. I don't know much about sld but I read some threads and it seems to be the right solution. I'll try to find some goog examples. It never ends...Always something new to learn Thanks Steve Steve Toutant, M. Sc. Analyste en géomatique Secteur environnement Direction de la santé environnementale et de la toxicologie Institut national de santé publique du Québec 945, avenue Wolfe Québec, Qc G1V 5B3 Tél.: (418) 650-5115 #5281 Fax.: (418) 654-3144 <mailto:steve.tout...@inspq.qc.ca> steve.tout...@inspq.qc.ca <http://www.inspq.qc.ca/> http://www.inspq.qc.ca Andreas Hocevar <ahoce...@opengeo.org>@openlayers.org Envoyé par : users-boun...@openlayers.org 06/01/2010 10:35 AM A users@openlayers.org cc Objet Re: [OpenLayers-Users] geojson - Performance issue Hi, 2000+ features is way too much for rendering in the browser. if you use mapserver already, then you can also query the layer as WMS layer, using sld_body with a filter. If your query is complex, use Layer.WMS.Post instead of Layer.WMS to avoid urls that are too long for IE. Regards, Andreas. On 2010-01-06 16:29, steve.tout...@inspq.qc.ca wrote: > > Hi, > I created a WMS (mapserver) layer containing 13400 polygons. It loads > in less then 3 seconds. Good. > > I need to develop a tool for the user so he can create a custom query > on this layer to retreive specific polygons. In a form, the user > select the parameters and launch the request. Here is the code below. > That works, but it takes minutes to render. Per example, a query that > returns 2482 polygons, In firebug I see that the query runs in less > then 2 seconds. > But, It seems that the creation of the geometries is an heavy task. I > get this warning in FF > > > I click on Continue several times and then I get geometries in the map. > > I guess 2482 polygons is simply too much for a vector layer. If that > is the case, is there another format then GeoJson I could use? Maybe > my approach is totally wrong... > > Any comments would be appreciated. > Thanks for your help, > Steve > > The code used: > > Ext.Ajax.request({ > url: 'requeteVulnerabilite.php', > method:'POST', > params: { inddef: cb_inddefValue}, > failure: function(){alert("Ca pas marché");}, > success: function(result, request ) > { > //alert(result.responseText); > vulnerabiliteLayer.destroyFeatures(); > var features = new > OpenLayers.Format.GeoJSON({'internalProjection':map.baseLayer.projection,'ex ternalProjection':map.baseLayer.projection > > > }).read(result.responseText); > var bounds; > if(features) > { > if(features.constructor != Array) { > features = [features]; > } > for(var i=0; i<features.length; ++i) { > if (!bounds) { > bounds = > features[i].geometry.getBounds(); > } else { > > bounds.extend(features[i].geometry.getBounds()); > } > } > vulnerabiliteLayer.addFeatures(features); > map.zoomToExtent(bounds); > } > > } > }); > > > > > /Steve Toutant, M. Sc./ > Analyste en géomatique > Secteur environnement > Direction de la santé environnementale et de la toxicologie > Institut national de santé publique du Québec > 945, avenue Wolfe > Québec, Qc G1V 5B3 > > Tél.: (418) 650-5115 #5281 > Fax.: (418) 654-3144_ > __steve.tout...@inspq.qc.ca_ <mailto:steve.tout...@inspq.qc.ca>_ > __http://www.inspq.qc.ca_ <http://www.inspq.qc.ca/> > > > > > _______________________________________________ > Users mailing list > Users@openlayers.org > http://openlayers.org/mailman/listinfo/users > -- Andreas Hocevar OpenGeo - http://opengeo.org/ Expert service straight from the developers. _______________________________________________ Users mailing list Users@openlayers.org http://openlayers.org/mailman/listinfo/users
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