Le 18/10/2010 15:59, MORREALE Jean Roc a écrit :
Le 18/10/2010 15:53, Jean-Claude Repetto a écrit :
Not only disk size is a problem, but also speed, for example when you
want to display the maps at very low zoom levels.
Jean-Claude
Make tiles out of the file so just the corresponding tiles get loaded.
Maybe tiling is a solution when you want to get only a small part of the
map at zoom level 1, but if you want to display the map at zoom level
1/256 you have to read 65536 tiles to display only one tile.
I have compared GeoTiff (tiled) and ECW, and ECW is MUCH faster at low
zoom levels.
Jean-Claude
_______________________________________________
Qgis-user mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/qgis-user
