[Openstreetmap-dev] Node / line segment database statistics separation

[Andy Robinson]

There is a growing trend that the difference between the number of nodes on
the database and the number of line segments is increasing. Currently it
stands at around 2% of nodes (dropped a little last night with Nick's
Freemap additions).

On the basis that I would have thought there would be proportionally more
nodes than line segments as there are two nodes required for a line segment
and thus you gain a node at the end of each line run, plus there are plenty
of loose nodes lying around on the map. Therefore you would expect the
number of nodes to increase more, proportionally with time, than line
segments and not the other way around.

I have also noted when editing that you can make a line segment from a node
and this seems to stick. Does it mean we have a large number of zero length
line segments on the database?

Andy

Andy Robinson