I guess it shouldnt be too hard to do it with geoserver cheers
2009/3/18 Heidt, Christopher M. <[email protected]> > If your just pointing directly to a large kml file then you are right, > but most systems have a handler that generates kml based on parameters. > > ------------------------------ > *From:* [email protected] [mailto:[email protected]] > *On Behalf Of *Tiemens, Gerben > *Sent:* Wednesday, March 18, 2009 5:15 AM > *To:* Ivan Grcic > *Cc:* [email protected] > *Subject:* Re: [OpenLayers-Users] Strategy cluster and slow map behavior. > > Thanks for your answer. > > I already searched in the way of WFS, but wanted it first to work with a > simple KML. As searching in the mailinglist and other resources didn't give > a solution, I will have to move to a WFS solution. > BBOX strategy will not work on KML so that is nog the right way to go. > > Maybe there might be an idea to leave out the clusterfeatures that are out > of view when using strategy cluster? Some sort of BBOX idea within the > clustering, but then for not attaching all the available features in a > KML to the layer, when features are out of view.(out of viewport bbox). > > Greets > > Gerben > > > > ------------------------------ > *Van:* Ivan Grcic [mailto:[email protected]] > *Verzonden:* Tuesday, March 17, 2009 5:07 PM > *Aan:* Tiemens, Gerben > *CC:* [email protected] > *Onderwerp:* Re: [OpenLayers-Users] Strategy cluster and slow map > behavior. > > Hi Tiemens, > > the problem is that the more you zoom in, more and more clusters are > created. So at the first several levels, you only have several clusters, > thats why it takes relativly small amount of time. The more you zoom in, it > takes lots of time to calculate clusters. > > This is happening because you are working with all the features all the > time, regardless of the bbox of the map (not good solution if you have more > then 50-100 features) > > I suggest: using BBOX strategy that filters out the features depending on > map extents, together with wfs protocol. Then it should work pretty fast. > > HINT: check ratio parametar and http://trac.openlayers.org/ticket/1830 > > Cheers > > > 2009/3/17 Tiemens, Gerben <[email protected]> > >> >> Hello OpenLayers List users, >> >> >> I'm implementing the cluster strategy and im facing a problem. I have a >> 500 features on the map from a KML file, with google layer as baselayer. >> With clustering on the KML layer, the map acts really slow. When zooming >> in, the map acts slower and slower. Every zoom step, the next zoomstep will >> be slower. >> When clustering is off, the map acts fast again, even it has more features >> on it. >> I turned of the special styling, but even that does not help in this case. >> The map keeps acting slow with each zoom action. >> >> >> My site is: http://www.getiem.nl/mineralmap/mineralmap.html >> The javascript is on http://www.getiem.nl/mineralmap/strahlen.js >> >> >> Does anyone have an idea why clustering is slowing down on the zoomed in >> map? >> Is this a bug or issue to resolve? >> Maybe you see a flaw in my code. >> >> >> >> 1. Steps to reproduce: >> 2. Zoom in on the map. >> 3. When zoomed in to lets say the Netherlands, its slowed down to >> seconds, >> 4. when zooming further, each step takes longer. >> >> >> >> My first insights are: all features are drawn in memory (also features >> outside map), and thats why it is taking longer when zoomed in: it draws all >> 500 features. But thats not satisfying, since loading all features at once >> and then zooming in is faster. >> >> >> Greetings >> >> Gerben >> >> >> >> << Please read our E-mail Disclaimer at the Grontmij Corporate website >> >> >> _______________________________________________ >> Users mailing list >> [email protected] >> http://openlayers.org/mailman/listinfo/users >> >> > > > -- > Ivan Grcic > > << Please read our E-mail Disclaimer at the Grontmij Corporate website >> > > _______________________________________________ > Users mailing list > [email protected] > http://openlayers.org/mailman/listinfo/users > > -- Ivan Grcic
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