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Thread: !critical! Tile placement 500m offset after zoom

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Permlink Replies: 3 - Pages: 1 - Last Post: 15-Feb-2011 14:55 by: OS OpenSpace Team Threads: [ Previous | Next ]
farkyss

Posts: 18
Registered: 31/08/10
!critical! Tile placement 500m offset after zoom
Posted: 15-Feb-2011 11:08
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This may be related to the other tile placement thread here, or may not.

Page loads at Zoom 7 and everything is normal.
Zoom in to 8,9,10 and everything is still fine
Zoom back out, and at zoom 7 and above, everything plotted on the map is offset 500m west, 500m south of where it should be
Zooming back in to zoom 8 or 9 or 10 shows everything correctly placed.

None of the objects plotted on the map are being changed before, during, or after the zooms. No custom or overloaded methods are being called before, during, or after the call.

This issue appears to be browser independant and happens on Firefox, Safari, and Internet Explorer. The page being worked on is on our internal development server which isn't accessable outside our network, but screenshots and/or code and/or access can be organised on request

OS OpenSpace Team

Posts: 1,112
Registered: 31/01/08
Re: !critical! Tile placement 500m offset after zoom
Posted: 15-Feb-2011 11:57   in response to: farkyss
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Hi 'farkyss'

Could I please ask you to send me the screen shots and code to me so we can have a look? Also the exact area (postcode/placename) that this issue appears?

Please email for my attention to osopenspace@ordnancesurvey.co.uk

Many thanks

Tamsyn
OS OpenSpace Team

farkyss

Posts: 18
Registered: 31/08/10
Re: !critical! Tile placement 500m offset after zoom
Posted: 15-Feb-2011 13:59   in response to: OS OpenSpace Team
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As computers so often do, it's now trying to prove me a liar by working again flawlessly. Please close/delete this thread, and i'll email you if the problem comes up again and can replicated

OS OpenSpace Team

Posts: 1,112
Registered: 31/01/08
Re: !critical! Tile placement 500m offset after zoom
Posted: 15-Feb-2011 14:52   in response to: farkyss
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Hi 'farkyss'

We have been looking into this and unfortunately it would appear that there is a bug within the system with the marker clustering component. Although the issue seems to be intermittent our recommendation on how to resolve this, until we can get a fix applied, would be to remove the clustering component from your code this should correct this issue for you as a temporary fix.

Please accept our apologies for this and thank you for bringing this bug to our attention.

Many thanks

Tamsyn
OS OpenSpace Team

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