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

[Lehtonen, Mika]

Something like in these examples:

http://geoserver.org/display/GEOSDOC/ComplexLabelingExample

- mika -

Lehtonen, Mika kirjoitti:
> Hi again,
> no, I believe you could use sld in this, of course in that case you 
> shift to wms. OGC spesification lets you use filters like 
> PropertyIsGreaterThan and PropertyIsLessThan and so on, in your sld. 
> Though I think there are more sophisticated approaches into this. Some 
> people use wms when zoomed out and shift into other methodes when 
> zooming in. Hard to suggest anything specific with information provided, 
> I am afraid.
>
> But as this is the Openlayers Users list, it might be wiser to move to 
> Geoserver list, if you like know more what you can do with it.
>
> - mika -
>
> willson kirjoitti:
>   
>> 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?
>>>
>>>   
>>>     
>>>       
>> _______________________________________________
>> Users mailing list
>> Users at openlayers.org
>> http://openlayers.org/mailman/listinfo/users
>>
>>
>>
>> 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.
>>
>>   
>>     
> _______________________________________________
> Users mailing list
> Users at openlayers.org
> http://openlayers.org/mailman/listinfo/users
>