[OSM-dev] Suggestion about how to setup a local osm development

[spaetz]

On Tue, Aug 07, 2007 at 07:57:50PM -0700, Chien Nguyen Khac wrote:
> For using OSM:
> 1. write SQL statements to clip and convert osm data to other map format directly (by pass planet.osm because planet.osm format is too huge).
> 
> For example: London city contains 410,566 nodes, 433,332 segments, 409,978 ways
> 
> If I use planet.osm format, London data file is 139MB.
> If I use polish format, London data file is only 21MB.

You know that there are weekly diff of the planet.osm published? Currently they are about 20MB per week (bzipped) which doesn't seem that bad. Nobody will disagree that the osm format takes lots of space, but it not necessarily thought for being optimal in size. It is a very convenient trasnport format which can easily be parsed and you can load it into your data base and compress and optimize the hell out of it. I recall that artem once got the whole of the planet down to 18MB with some trickery.

spaetz
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