[talk-ph] Navteq/Nokia finally shows their mapping data for the Philippines

Ronny Ager-Wick - Develo Ltd. raw at develo.ltd.uk
Sun Feb 7 06:49:53 GMT 2010

I think the best way to detect theft of data is an old and proven one, 
making certain (privately documented) mistakes on purpose, so you can 
check if the map in question includes it. As most of you well know, it's 
not possible to copyright reality, but fiction (erroneous data is 
fiction) is copyrightable.
However, I'm not sure what's the consensus for introducing errors on 
For them to be effective, they should not be announced publicly, so I 
guess each individual contributor would have to make a couple or 
mistakes in their areas and keep them for themselves.
OR, for integrity, a few of us may sign up as "intentional mistake 
database maintainers", where each contributor sends their the node/way 
number or a special comment they made on their mistakes to a random 
person on this list. This was, at least two people will know about each 
mistake, but the security of the scheme is not compromised as nobody 
knows about every mistake made.
Hehe, maybe I'm getting a bit too much secret agent here, but it *would* 
work! :)

maning sambale wrote:
> Out of simple curiosity, is there a way to detect that some of our
> data was conflated into the navteq ph coverage?  I believe navteq
> contracted a local company to update Philippine data.
>> Looking at their maps, the road data for Metro Manila and surrounding area
>> seems good and somewhat up-to-date (though I can easily spot several
>> out-of-date portions). For instance they barely pass my Bonifacio Global
>> City test but fail the C-5 extension test. Coastline data is pretty bad, on
>> the other hand.
>> In terms of coverage, I think they can match Google's Map Maker data.
> Is navteq's data similiar to G's MMaker outside Metro Manila?
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