[OpenLayers-Users] Need explanations : minScale/maxScale with scales set on map

[Eric Lemoine]

Hi. It looks like that if you set minScale/maxScale OpenLayers takes
it as "calculate the intermediate resolutions". I cannot think of
something better than pass your layer a scale array. I may be missing
it though. Cheers. Eric

2008/9/8, Alexandre Dube <adube at mapgears.com>:
> Hi everybody,
>
>   I need some explanations regarding minScale/maxScale with 'scales'
> array set on map, please.
>
> Release/2.7/Note
> Layer :
>     minScale' and 'maxScale' properties no longer ignored if 'scales'
> array set on map. (#1199 <http://trac.openlayers.org/ticket/1199>)
>
> Yeah, they are not ignored, but only both theses scales correspond the
> actual map scales, not the ones between them.
>
> For example, I have the following scales set for my map :
>
> scales: [13000000, 8000000, 4000000, 2000000, 1000000, 500000, 250000,
> 100000, 50000, 25000, 10000]
>
> If I set minScale: 1000000, maxScale: 100000 to a layer and then check
> its scales array, I get the following :
> index : value
> 0 : 1000000.0000000001
> 1 : 464158.8833612779   // instead of 500000
> 2 : 215443.46900318837  // instead of 250000
> 3 : 99999.99999999999
>
> I can understand how theses values are set this way.
> I don't know why they do.
> Are the values ok ? Will this affect anything ?  ( because they are
> different than the scales from the map )
> I don't understand why the layer could not have the values in the scales
> array of the map directly instead of calculating its own...
>
> Sorry for the long e-mail.  I only need some explanations, please.
>
> --
> Alexandre Dubé
> Mapgears
> www.mapgears.com
>
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