[OpenLayers-Users] Maximum extent shrinks when zooming in

[zenzero-2001]

Hi Christopher,

Thank you for your swift reply. You are probably right that it is not a bug,
I will have to do some further investigation and report back. I have a bit
of deadline at work at the moment, so it will have to wait.

Actually I never said that changing maxResolution solved the problem. In my
first post, I said changing it to 'auto' did not solve the problem. Using
the restrictedExtent keyword, however, has 'solved' the problem :)

Best Regards,

John Westwood  (zenzero-2001)




Christopher Schmidt-4 wrote:
> 
> On Tue, Apr 15, 2008 at 03:00:28PM -0700, zenzero-2001 wrote:
>> 
>> Hi Christopher,
>> 
>> That's interesting that's it's not considered a bug. Personally, I would
>> definitely think of it as a bug or possibly an undocumented feature :) I
>> hope you don't think that I was complaining, I think that OpenLayers is
>> great. 
> 
> Well, if you think there's a bug, you need to do further description of
> the issue to convince me, is all. What you have described so far sounds
> to me to be not a bug. What you have described so far sounds to me like:
> 
>  * I have a map, from (for example) -10, -3, 10, 3
>  * I set a maxResolution of 6 / 256, so that my whole world fits
>    vertically within one 256 px tile
>  * Because my map is 20 units wide, it is 4 tiles wide, and therefore
>    covers more than -10 -> 10 in the longitude direction: 24 degrees.  
>  * When I zoom in, my resolution drops to 6/512:
>    * Vertically, the world is two tiles. 
>    * Horizontally, it is 7 tiles -- taking up less horizontal
>      geographic space than before: 21 degrees.
> 
> Since you've said you can change your maxResolution, and it 'solves' the
> problem, I assume that you've found that if you pick a maxResolution
> that divides *evenly* into the width *and* height (in this case,
> something like '2' would do: 3 tiles high, 10 tiles wide), you will see
> that the tiles match your geographic space correctly.
> 
> If this is *not* what you're describing, then you'll need to be more
> clear, because this behavior isn't a bug: in fact, I don't know of any
> way around it.
> 
> Regards,
> -- 
> Christopher Schmidt
> MetaCarta
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> 
> 

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