I've just come back to the problem below and thought I'd dig around with Chrome's Element Inspector feature. It revealed something interesting which seems to be the problem. With a VE base map, the tile requested is at the wrong zoom level. For example, with the Google, Yahoo and OSM base maps, the overlay tile is:
.../10/506/335.png But when the VE base map is used, it tries to fetch: .../9/506/335.png which is not there. Since I'm sure the base layers are supposed to be consistent, I now suspect this to be a bug. Regards, Warren -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Warren Vick Sent: 15 January 2009 12:46 To: [email protected] Subject: Re: [OpenLayers-Users] Problem with overlays on VE Sadly no feedback on this. However, I've made available a demo illustrating the problem: http://europa.uk.com/demo/ve_tms_overlay_problem.html The purple roads overlay is a TMS layer. It sits perfectly over Google, Yahoo and OSM, but disappears when VE is selected as the base. You can see image placeholders appear for tiles that don't exist. Is this a bug in OL or have I done something stupid?! Regards, Warren Vick -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Warren Vick Sent: 06 January 2009 10:43 To: [email protected] Subject: [OpenLayers-Users] Problem with overlays on VE I'm having problem with an overlay on a Virtual Earth base. The TMS overlay has been created with Mapnik/generate_tiles.py in ESPG:900913 and looks fine when placed as a base layer. However, when placed on a VE base, the overlay disappears. Just to check I wasn't going mad, I used SphericalMercator.html and found my overlay works fine over Google and Yahoo maps. It's just the VE base which shows the problem. Any thoughts on what's different with a VE base? Regards, Warren Vick _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
