[OpenLayers-Users] Best practice for many points

[Claudio V.]

Hi, just to be sure, you mean more than 1,000 points/markers (not polygons
or lines)? In the only experience I had with that many points I wasn't
loading the KML through OpenLayers.Layer.Vector (as in
http://openlayers.org/dev/examples/kml-layer.html, for example). We had a
'upload' dialog, so that the user could choose a file from his machine. We
then used the KML Parser to extract the features and then added to a layer.
This way we were able to display around 20,000 markers (before things
started to get slow). If what you're doing is something similar I could
give you some hints.


2013/7/28 Phil Scadden <p.scadden at gns.cri.nz>

>
>  What is the best practice to plot more than 1,000 itens from a KML file?
>>
>> I have tried cluster strategy, but it still takes too much time.
>>
>> Any clue is welcome!
>>
> I would say best practise is dont use any vector format for more than 500
> points of geometry, period. And KML can be considerably more verbose than
> say GML. You are up against limitations of the browser, network transfer
> speeds and especially the execution speed of js. Have a long look at the
> application and see how you move rendering to the server (WMS). If you are
> stuck with KML, then look at the KML module in geoserver for example.
>
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