[OpenLayers-Users] Vector layer with dinamic data

[Adrian Popa]

Hello,

I'm trying to accomplish the same thing and I followed your advice - 
using vector + BBOX, but I hit a snag - because my POI layer has a lot 
of elements, I would like to enable this layer only for a certain zoom 
level (when the user is really close). Is there some standard 
functionality for a layer - making it visible (and doing the queries) 
only from a zoom level onwards?

If I try to fix things server-side (not returning anything if the zoom 
is to low), openlayers will not query again because the zoomed BBOX is 
included in the original BBOX and it thinks nothing changed...

Thanks,
Adrian

Andreas Hocevar wrote:
> Hi,
>
> this answer Eric gave to a similar thread in January should get you there:
> http://openlayers.org/pipermail/users/2009-January/009709.html
>
> Regards,
> Andreas.
>
> On Mon, Jun 29, 2009 at 8:42 AM, Alexandru
> IOVANOVICI<iovanalex at gmail.com> wrote:
>   
>> Hello,
>>
>> I'm working on a application in wich i have some vector data (a kml file
>> with paths) wich i have to display over a map. I have the data in a database
>> and i can create the kml on-the-fly with a php script, based on some url GET
>> params. I want the create a kml file wich contains only the lines wich are
>> in the current viewport and at a level of detail depending on the zoom
>> level. So, when the user pans the map i shoud update the kml file and
>> display the new data. Same thing when the user zooms the map. My PHP script
>> and kml file are tested and working ok.
>> The problem is how do i code the javascript for this layer. For a similar
>> POI layer i used the instructions from here
>> http://wiki.openstreetmap.org/wiki/OpenLayers_Dynamic_POI and it is ok. But
>> in this case i have no getUrl arg to the constructor.
>> How can be done this ... because i'm sure there is a solution ...
>>
>> Thank you,
>>
>> Alexandru IOVANOVICI
>>
>> _______________________________________________
>> Users mailing list
>> Users at openlayers.org
>> http://openlayers.org/mailman/listinfo/users
>>
>>
>>     
>
>
>
>   

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/openlayers-users/attachments/20090630/14dbe687/attachment.html