[OSM-dev] .osm tile naming convention

Ian Dees ian.dees at gmail.com
Fri Jun 4 21:03:37 BST 2010


On Fri, Jun 4, 2010 at 2:50 PM, Richard Fairhurst <richard at systemed.net>wrote:

>
> Frederik Ramm wrote:
> > Why not just use the same naming we use for bitmap tiles. It's
> > well established and everyone understands it.
>
> It's not really suitable for vector data, though. Firstly, the concept of
> zoom levels doesn't apply - the vector data is the same at every zoom. You
> could choose an arbitrary zoom level, perhaps, but you then risk choosing
> one that's either too small-scale for mid-Wales (hundreds of empty tiles)
> or
> too large-scale for Karlsruhe (a few very big tiles). Secondly, to rephrase
> Jukka's point, "everyone" is only "every OSM nerd", not "everyone who wants
> a simple drop-in map for their webpage".
>
> Nic's suggestion looks interesting and I wonder whether
> xmin_ymin_xmax_ymax.osm, with a configurable option to use either integer
> projected co-ordinates or raw lat/longs, might be a good way forward.
>
>
What about using a geohash lopped off at a certain number of digits? This
forms a bounding box and gives a nice single-string filename.
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