[OSM-talk] Downloading lots of tiles from tile.openstreetmap.org

[Jason Reid]

Jon Burgess wrote:
> We don't have any specific terms of service for downloading tiles from
> tile.openstreetmap.org and people often download thousands of tiles with
> scripts. Quite often people often submit requests for completely invalid
> tile co-ordinates. A couple of examples from this evening:-
>
>
> [09/Nov/2007:20:15:35 +0000] "GET /mapnik//12529/11592.png HTTP/1.1" 
>
> * The zoom level is missing from this request.
>
>
> [09/Nov/2007:22:40:08 +0000] "GET /20/528358/383233.png HTTP/1.1"
>
> * This client is trying to fetch zoom=20 tiles which have never existed.
> The highest zoom for the Mapnik layer is 18
>
>
> The examples have been repeated 100,000+ times from 2 IP addresses
> today. I don't want to restrict people from downloading lots of tiles
> but if people keep submitting bad requests then it is a complete waste
> of bandwidth and server resources.
>
> If you write tools to grab lots of tiles please at least try to ensure
> you are fetching valid tiles URLs!
>
> 	Jon
>
>   

One thing that I will check is if any are coming from the newest release 
of Maemo-Mapper for the Nokia tablets, the 2.0.3+ release increased the 
maximum zoom levels so its possible that it may be trying to fetch 
beyond what we have. I will test and confirm later tonight once I find 
where I left my N800.

Jason