How to force mapnik render only not empty tiles?

@NicolasDumoulin do you add this line in the end of generate_tiles.py ????

Well, no, it is a bash command (linux). But I think you can achieve the same in pure python as follow:

import os,glob;

for f in glob.glob('tiles/**/*'): if (os.path.getsize(f) == 0): os.remove(f)

@NicolasDumoulin when I make find tiles/ -size 116c | xargs rm I get rm: missing operand

here is the output marmur@marmur-Extensa-5635ZG:~/tiles$ find yerevanMap/ -size 116c | xargs rm rm: missing operand Try `rm --help' for more information. marmur@marmur-Extensa-5635ZG:~/tiles$

Any idea why???

I think it is because the result of the command find is empty, you can check it by removing "| xargs rm" from the command. Maybe the size value isn't correct. I've found the "116" by looking at the printed size of my empty tiles with the "ls -l" command.

@NicolasDumoulin -rw-rw-r-- 1 marmur marmur 139 2011-11-23 00:51 0.png I get this... so should it be -size 139c???