[OSM-talk] OSM completeness

[Stephan Knauss]

Eleanor Stokes writes:

> Does anyone happen to know of completeness analyses
> across cities in different regions that have been performed?
> I'm particularly interested in the completeness of the
> road datasets in OSM.

there was a talk at SotM-EU 2011:
http://2011.sotm-eu.org/talk@3.html
Fraunhofer IAIS did some comparison.

If you don't have access to a reference data set it might be difficult to  
come up with a number.

If a rough estimation might be OK, you could use my website  
http://compare.osm-tools.org/ and count red pixel from a screenshot. Divide  
that by the average street-width in pixel on that scale and then you have  
the length of the road network (in pixel at scale) which is not in OSM dataset  
but in Google.

Background information:
http://www.osm-tools.org/compare.html

Stephan