[OpenLayers-Users] How to add many(>400) markers to the map?

[willson]

Hi,
if you were using Geoserver and wms, dynamic symbolizer could help you. 
Check the following out:

http://blog.geoserver.org/2008/12/08/dynamic-symbolizers-part-1/

- mika -


willson kirjoitti:
>
> Hi,
> try to search mailing list for strategies, performance. I have the same problem not solved yet. It looks I will have to render at server site.
>
> Michal
>
>
> Hi everyone, this is the first post on this forum. I have search the problem on the forum, but find no anwser.
> What I need to solve is:  I have more than 400 points need to show on the map, these points query my db every 10 secs, and change their color according to the return value. 
> I use the openlayers.layer.marker to implement, but in ie the markers make the map so slow when zooming.
> Then I move to  openlayers.layer.vector, but it's even slower than marker.
> Any suggestion in such "Adding large and dynamically changed markers"  situation?
>
>
>
>
> hi, render in serverside(may be wms) can improve the performance much, but how to make markers dynamically change color? Any solution?
>
>   
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hi,
Yes, I am using geoserver and wms. I have look at the link, but it may be not the answer. Since the data in my db change frequently,  and the marker need to reflect these changes. For example , I have a table, and a column named "kpi", when kpi<0.01, the marker's color is green, else is red. It may be not an "sld" issue.

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