[OpenLayers-Dev] resolutions/scales question

[Tim Schaub]

Hey-

Eric Lemoine wrote:
> Hi devs
> 
> I have a question related to resolutions and overlays. initResolutions
> calculates the resolutions array. Is this at actually needed for
> overlays? Don't overlays always use the resolutions defined in the
> base layer?

Yep, they do.  So, layer.resolutions is ignored for all but the base layer.

I look forward to talking about fixed resolutions and "base layers" for 3.0.

We've got a number of applications that don't differentiate between 
overlays and base layers.  That is, any layer can be displayed as the 
lowest layer in the draw stack and any layer can be used to determine 
projection related parameters.  For this to work (effectively switching 
isBaseLayer from false to true and back), the initResolutions call is 
needed somewhere.  (In case you were going to suggest doing away with it.)

Tim

> 
> Thanks,
> 
> Eric
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-- 
Tim Schaub
OpenGeo - http://opengeo.org
Expert service straight from the developers.