Awesome! I have been working on some tile expiring myself however I stumbled upon some problems that would increase the execution time dramatically. So I will check out your code!
However I am wondering is it possible to add a range of zoom levels? Since I probably want to erase zoom 10-18. --Roeland On Sunday 08 February 2009 11:23:45 Steve Hill wrote: > I've been working on code to generate a list of dirty tiles while > importing the deltas. The attached patch introduces 2 new commandline > options: "-e <zoomlevel>" and "-o <dirty tile list output file>". So, > specifying "-e 17 -o /tmp/dirty_tiles" when importing a delta will cause > osm2pgsql to generate a list of all zoom level 17 tiles which the delta > has made dirty and store it in /tmp/dirty_tiles. > > Proviso: for polygons, it currently takes a simplistic approach of drawing > a bounding box around the whole polygon and marking every tile in the box > as dirty. If the bounding box is large (over 30x30Km) the polygon is > treated as a line instead, so only the perimeter will be marked as dirty > (this is so that huge polygons don't expire vast numbers of tiles and is > based on the assumption that we probably aren't going to shade the area > of massive polygons). > > The dirty tile list is maintained in memory as a binary tree and dumped to > disk at the end of the run. > > I'm running this code on OpenPisteMap and it seems to be working ok. Does > anyone have any objection to me committing these changes to the > OpenStreetMap subversion server? > > - Steve > xmpp:[email protected] sip:[email protected] > http://www.nexusuk.org/ > > Servatis a periculum, servatis a maleficum - Whisper, Evanescence _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
