[OSM-dev] distribution of IDs

[Marcus Wolschon]

Hello,

I am currently exprimenting with different index-formats for
http://wiki.openstreetmap.org/wiki/User:MarcusWolschon%5Cosmbin_draft
.
My current index assumes that the list of encountered ID-values is
quite dense = there are fewer unused ID-values then used ones.

Does this assumption hold true or are our ID-values more sparsely
distributed in the world-file?

Currently I'm working with a hamburg-extract and my current (preptty
bad) index takes 3 times the disk-space the binary-data
do. I wonder if this ration would be better for a world-file or if I
need to optimize here.

Marcus