Homme Zwaagstra <hrz <at> geodata.soton.ac.uk> writes: > > Hello, > > I've come up against a problem with `gdalbuildvrt` taking a long time to > create > a VRT when it is passed a large number of source datasets. I am trying > to create > a VRT file for a zoom level in a TMS structure containing JPEG tiles. The > command I'm using is: > > gdalbuildvrt output.vrt `find ./tiles/18 -iname *.jpg -printf "%p "` > > where the number of tiles is: > > $ find ./tiles/18 -iname *.jpg | wc -l > 767104
I would say that you are doing all wrong thing. First, the jpeg tiles in tile service directory structure are not referenced with world files (.jgw) or anything and your .vrt file would be useless. The right thing to do is to study the file naming schema that the cache is using. When the schema is known the right tile can be found directly because the logic knows how the tile directory structure is like and which names are used for the tiles. If it is an OSGeo TMS schema it is described here http://wiki.osgeo.org/wiki/Tile_Map_Service_Specification#TileMapService_Resource If it is using the Google/Bing tile naming schema then you can find examples here http://www.gdal.org/frmt_wms.html. But if it is a GeoWebCache tile cache you may be out of luck because I haven't seen so far any configuration file that would make GWC tilecache usable for GDAL. -Jukka Rahkonen- _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
