[OpenLayers-Users] maxExtents for Layer vs maxExtents for Map

[srweal]

Thanks Andreas and Eric for your responses.  But I still have one remaining
question.

If I set maxExtents on a WMS overlay layer and it is smaller than the
maxExtents of my map, will tiles be requested from the WMS (or TileCache)
for areas that are outside the bounds specified for the WMS layer, but still
within the viewport that is showing the larger extent of the map?

Steve


Andreas Hocevar-2 wrote:
> 
> Hi,
> 
> srweal wrote:
>> Actually, to simplify this question a bit, can someone please just
>> explain
>> how the setting for mapExtents on a Layer, as opposed to setting
>> mapExtents
>> on the Map differ?
>>   
> 
> The maxExtent of the active base layer takes precedence over the 
> maxExtent of the map. For overlays, maxExtent is only used to determine 
> if the layer is to be displayed or not, i.e. if it would be visible in 
> the current viewport.
> 
>> I'm particularly interested in whether they each limit the tiles
>> requested
>> from the servers.  My situation is that I have a large extent I want
>> visible
>> on the map, but have multiple different layers that each provide tiles
>> for
>> smaller parts of the map extent, so I want them to only request tiles
>> from
>> the appropriate areas.  
>>   
> 
> In that case you would set a large maxExtent of the map (or base layer), 
> and small maxExtents for your other layers.
> 
> Regards,
> Andreas.
> 
> -- 
> Andreas Hocevar
> OpenGeo - http://opengeo.org/
> Expert service straight from the developers.
> 
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> 
> 

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