I don't think this will be a full solution to what you need, but it might get you started. We update the tile urls requested so that they are compatible with Google Tile index system.
We do this by setting an option called getURL when creating either a WMS or TMS layer. getURL's signature is function YourGetTileURLMethodName (bounds) I think this will get you from a tile's bounds to the URL you need however, I don't think it will handle splitting up a larger BBOX into the smaller BBOXs to handle all of the tiles. You can find the documentation on the WMS.getURL method at http://dev.openlayers.org/releases/OpenLayers-2.7/doc/devdocs/files/OpenLayers/Layer/WMS-js.html#OpenLayers.Layer.WMS.getURL and the TMS version at http://dev.openlayers.org/releases/OpenLayers-2.7/doc/devdocs/files/OpenLayers/Layer/TMS-js.html#OpenLayers.Layer.TMS.getURL To get the function defintion for the Openlayers implmentation you can execute the following statement in a JavaScript debugger. alert (LayerVariable.getURL); The default implementation on the dev build we are using is: function (bounds) { bounds = this.adjustBounds(bounds); var imageSize = this.getImageSize(); var newParams = {BBOX: this.encodeBBOX ? bounds.toBBOX() : bounds.toArray(), WIDTH: imageSize.w, HEIGHT: imageSize.h}; var requestString = this.getFullRequestString(newParams); return requestString; } Jon Hi List! I am trying to selectivly delete tiles from TileCache for specific BBOXes in order to regenerate parts of the map. I am using this script which Tim posted two years ago: http://n2.nabble.com/locating-bad-tiles...-td1836476.html Supplying the URL which OpenLayers generates for a specific tile refreshes this tile in the TileCache. So I need to know how OpenLayers calculates the BBOXes for the tiles to be requested. Can someone point me to this piece of code? Here is what should happen: - I have the BBOX of the part of the map that should be regenerated - calculate the corresponding tiles in all zoom levels - pass these tiles' BBOX to Tim's script that regenerates the matching tiles in the TileCache or in short: how to get the URLs for tiles, that cover a specific area? Thanks for any hints - or even better approaches. Kevin -- http://www.kevinkempfer.de Tel.: (07071) 860303 ICQ: 2186573 Skype: kevin0815 Natürlich gibt es eine jenseitige Welt. Die Frage ist nur: wie weit ist sie von der Innenstadt entfernt, und wie lange hat sie offen. Woody Allen _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users -- View this message in context: http://n2.nabble.com/how-to-calculate-BBOX-for-tiles-tp2604027p2621502.html Sent from the OpenLayers Users mailing list archive at Nabble.com. _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
