[OSM-dev] mod_tile - meta tile computation

[Frederik Ramm]

Hi,

Philipp Borgers wrote:
> I'm trying to write a nginx module which does more or less the same like
> mod_tile. I reviewed a lot of the code but now I have a little problem
> with the computation of paths to meta tiles. Could someone please
> explain me how mod_tile creates file paths from a request and how the
> offset is computed? My own code looks exactly the same but returns
> x=0,z=0 for every input. I'm highly confused :)

The result of this computation is a series of 5 integers stored in the 
hash[] array, plus an offset. The resulting x and y values are of no 
concern. The reason you are confused is proably because you have your 
code print out

>         printf("%d,%u,%u\n",cmd->z,x,y);

at the end, which is not what this code is supposed to compute.

Bye
Frederik

-- 
Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00'09" E008°23'33"