[OpenLayers-Users] Vector layer - number of circles

[Vivien Deparday]

Hi Brad,

You are right, it is because the number of features is too important ( 
see the faq in the section vector 
<http://faq.openlayers.org/vector-related-questions/what-is-the-maximum-number-of-coordinates-features-i-can-draw-with-a-vector-layer/>). 
One solution is to use the cluster strategy, it will speed up your 
display (see the two examples: http://openlayers.org/dev/examples/ ) If 
you don't want to cluster your features, another solution would be to 
use a simple wms for big extents and then use your vector layer with a 
BBOX strategy for smaller extent. That way only the features in the 
visible extent will be requested (see also the example). That all I came 
up with, maybe someone will have a better idea...

Hope it helps,

Vivien


Brad Spencer wrote:
>
> I have built a file upload and display feature that generates a 
> temporary vector layer [as if markers] that are a series of graduated 
> circles with mouseover popups. This works like a treat for relatively 
> small files of points. But if I load a lot of points [over 2,000] it 
> takes a long time to load and panning and zooming is very slow. I 
> assume its just the number of local vectors.
>
> Is there any techniques that I could use to improve load times as well 
> as navigation refreshes?
>
> Cheers, Brad….
>
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