[OpenLayers-Users] Lots of spurious tiles get loaded when changing base layer

[Jon Blower]

Hi,

I have an OL2.6 application that uses base layers in different map
projections.  The map is initially constructed with a base layer in
lat-lon (EPSG:4326).  If I change the base layer to a layer in polar
stereographic projection (EPSG:32661) the map loads a whole load (up
to 40) of spurious tiles.  This effect can be seen by loading the
attached example web page and using Firebug (or similar) to examine
the outgoing GetMap requests.  The spurious tiles have a bounding box
that is inappropriate for the current zoom level and map extent (this
shows up clearly because the extents for 4326 and 32661 are very
different in their native units).

Registering an event listener for changebaselayer does not help: it
seems that the spurious tiles are loaded anyway.

Cheers, Jon

-- 
--------------------------------------------------------------
Dr Jon Blower Tel: +44 118 378 5213 (direct line)
Technical Director Tel: +44 118 378 8741 (ESSC)
Reading e-Science Centre Fax: +44 118 378 6413
ESSC Email: jdb at mail.nerc-essc.ac.uk
University of Reading
3 Earley Gate
Reading RG6 6AL, UK
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