Hi,<br><br>I was using the following configuration for tilecache:<br><br>--<br><br>[cache]<br>base = /tmp/tilecache<br>type = Disk<br><br>[basic]<br>type=Mapnik<br>mapfile=/var/www/mapfile.xml<br>srs = EPSG:4326<br><br>#---------------------#<br>
# Impostazione regione#<br>#---------------------#<br><br>bbox = 9.7,39.7,15.3,45.3<br>size=600, 600<br>resolutions = 0.0093333330,0.0046666665,0.0023333332,0.0011666666,0.0005833333,0.0002916667,0.0001458333,0.0000729167,0.0000364583,0.0000182292,0.0000091146<br>
<br>--<br><br>Now, I've projected all the shapes with ogr2ogr using with the following:<br><br>+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs<br><br>that should be the projection used by Google.<br>
So I changed the tilecache config:<br><br>--<br><br>[cache]<br>base = /tmp/tilecache-proj<br>type = Disk<br><br>[basic]<br>type=Mapnik<br>mapfile=/var/www/mapfile-proj.xml<br>srs = +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs<br>
<br>#---------------------#<br># Impostazione regione#<br>#---------------------#<br>bbox = 1079799,4936842,1703799,5560842<br>size=600, 600<br>resolutions = 1040.0000000000,520.0000000000,260.0000000000,130.0000000000,65.0000000000,32.5000000000,16.2500000000,8.1250000000,4.0625000000,2.0312500000,1.0156250000<br>
<br>--<br><br>and, of course, the mapnik mapfile. Now the tilecache_seed.py is taking about 0.9 seconds for generating a single tile, while before this modification the time required was about 0.02 s. All the shapes are indexed with shapeindex on 64 levels. It's possible that a change in the projection cause such a dramatical performances decrease? Or maybe tilecache is trying to "reproject" something?<br>
<br>Thank you all,<br><br>Damiano<br>