[OSM-dev] osm2pgsql for 64-bit IDs

[Anthony]

On Sun, Jun 5, 2011 at 7:38 PM, Scott Crosby <scott at sacrosby.com> wrote:
> On Sun, Jun 5, 2011 at 8:41 AM, Anthony <osm at inbox.org> wrote:
>> On Sun, Jun 5, 2011 at 8:39 AM, Frederik Ramm <frederik at remote.org> wrote:
>>> Linestrings with internal geometries are very unlikely to happen, for a
>>> number of reasons, one of them being topology.
>>
>> That's too bad.  More than 90% of node ids are completely useless as
>> they refer to only one way.
>
> Out of curiosity, I did a test on this, because I was planning on
> exploiting this 'conventional wisdom'. I was hoping that 99% of nodes
> occur in one way, but on a 2010-08 planet, 85% of nodes occur in one
> way, 12% in 2, and 1% in more than two..

Yeah, last time I checked it was just slightly over 90%.  But even if
it's only 80% of nodes that are completely useless, I think it's worth
doing something about.  Or at least considering doing something about,
and not writing it off as "it has to be that way but I'm not going to
tell you why".