[OSM-talk] osmarender4

OJW streetmap at blibbleblobble.co.uk
Sun Feb 18 18:52:32 GMT 2007


On Sunday 18 February 2007 14:48, David Earl wrote:
> Finally, I was rather dismayed to find that the rendering styles in the
> slippy map change from tile to tile in quite small areas around Cambridge -
> some bits have railways solid, some dashed. Presumably this is because
> tiles at home users haven't updated to osmarender4, as Fred, I think, pointed
> out before. 

First, check that it's due to someone using an old version, and not just a 
tile that hasn't been updated since the last renderer change.

Right-click, "view image" on any tile, then add a "_details" to the end of the 
URL to see who created it and when.

e.g.  
http://dev.openstreetmap.org/~ojw/Tiles/tile.php/15/16287/10807.png_details

If particular tiles are out-of-date, you can ask for them to be updated:
http://wiki.openstreetmap.org/index.php/Tiles%40home/API#Requesting_updates

> What's to stop me from adding my own favourite 
> renderings within tiles at home and causing chaos?

Same as if you uploaded hello.jpg as a tile in the middle of london - we 
disable the account used to upload those tiles, and request a re-render of 
any areas that account has contributed to.

The reason we haven't done that for people with out-of-date renderers yet is 
(a) it's not a very nice way to treat people who are contributing to the 
project, and (b) tiles at home doesn't give them a proper error message when 
upload fails, so they may not even be aware that their computers' work has 
been discarded.

I'd suggest just emailing people with old renderers asking them to update at 
the moment, rather than blocking them completely.  

Use the "_details" trick above to see who created the tile -- most of the 
usernames are easy to match with regular people on IRC or the mailing list, 
and there's some more info for finding people on 
wiki.openstreetmap.org/index.php/Tiles%40home/Credits

> Is there no way to prevent acceptance of tiles uploaded from 
> old installations? 

In progress. Some of the clients are already reporting version-identifiers 
(see them at http://dev.openstreetmap.org/~ojw/Log/Messages/ ) - and it will 
be relatively easy for the server to not speak with old clients if we decide 
that's what we want to enforce.





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