> Whole world dump (bzip2 compressed) is 6.2 GB

It would be possible to filter this to produce a smaller (but less
precise) version, which might be ample for your requirements.

For example a sweeping curve may be drawn in OSM with a node every meter,
taking 100 nodes. When in reality it is derived from GPS data with 6m
accuracy.

Distilling this down to a way which is 'not more than 5m away' from the
original might save a considerable amount of space.

You can also strip out all of the data/tags which you are not interested
in rendering.

Obviously you would not want to upload any of this 'tainted' data back
into the OSM database.

Simon.


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