[OpenLayers-Users] when panning E/W, map shifts in Y direction

[Christopher Schmidt]

On Mon, Feb 19, 2007 at 09:08:57AM +0100, Bart van den Eijnden (OSGIS) wrote:
> Hi Christopher, list,
> 
> I've tested this with 2.3RC3 this morning and the problem is still there
> (1=initial, 2=pan 4 times east, 3=pan 4 times west again).
> 
> 1: BBOX=111645.979497,503397.695033,112524.885747,504031.32512
> 2: BBOX=113406.936564,503400.839599,114285.842814,504034.469686
> 3: BBOX=111652.26863,503403.984165,112531.17488,504037.614253
> 
> Now there is even a change in the X-direction which was not there before.
> The change in the Y-direction seems less though.

Bart --

This issue is also present in OpenLayers 2.2, 2.1, and 2.0. I would say that 
given the differences, we are probably dealing with subpixel rounding 
issues: it looks like your difference is about 6 units / 650 units, which
(depending on your map size) seems likely to be a difference of about
1px.

Since this existed in 2.2, I don't think it should be considered a
blocker for 2.3, but should be opened as a ticket against 2.4.  

I agree that this behavior is odd, but it seems unlikely to be a blocker
for use of the API, if it hasn't come up until now :)

Do you feel okay with this?

Regards,
-- 
Christopher Schmidt
MetaCarta