[OSM-dev] Osmosis: Subtiling the planet with nice ways proposal

Lambertus osm at na1400.info
Tue Jan 15 08:34:25 GMT 2008


Steve Ratcliffe wrote:
> One thing to add is that ideally you want to split tiles so that they are
> smaller where there is more detail and larger elsewhere.  If you look at
> the map viewer on the Garmin web site, for example - Metro Guide Europe,
> you can see the tile outlines.  Over London they are much smaller than
> anything we do, although there is just one tile over much of Wales. Of
> course they have more data.
> 
True, the current 'hard' 0.25 sq tilesize isn't optimal (though 
necessary to hold the Rotterdam area), but that is simply a matter of 
defining my bboxes differently and does not solve the actual problem 
where ways are missing on tileborders.

On the other hand; if there is no problem with the tile crossing ways 
then there seems no real reason not to use the small square size: Units 
with much storage space don't suffer and units with limited storage have 
the advantage of a fine grained tileset (so you can travel further 
without running out of space possibly).




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