[OSM-talk] The completeness of OpenStreetMap

[Iván Sánchez Ortega]

El Miércoles, 25 de Junio de 2008, Edward Johnson escribió:
> One of the most interesting parts is how can we quote completeness of the
> map?

IMHO, the problem with any metric is that you cannot get an accurate number 
for "all". 

However, you can get a metric from a datasource considered "complete", and 
compare the numbers. You can suppose OSM is "complete" when the OSM metrics 
are equal or better than the other datasource's metrics.

Case in hand: Here in Spain, the OSM community has a very good relationship 
with the national mapping agency (IGN), so we can ask them for some numbers. 
Currently we've got some numbers regarding the total lenght of the road 
network. Also, the gazeteer for the electoral census (containing *all* street 
names) is near-public domain, so we could match how many street names OSM has 
got, compared to the official number of street names.

I'll get you the lies, the damn lies, and the statistics in the State of the 
Map, though. ;-)


Cheers,
-- 
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Iván Sánchez Ortega <ivan at sanchezortega.es>

FORTUNE PROVIDES QUESTIONS FOR THE GREAT ANSWERS: #31
A:	Chicken Teriyaki.
Q:	What is the name of the world's oldest kamikaze pilot?
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