[OSM-legal-talk] OSM based GPS navigations and ODbl license of OSM data

Karel Charvat Charvat.K at seznam.cz
Thu Jan 8 16:43:19 UTC 2015


Let's suppose you are using data from external source to estimate actual 
travel speed at various places. Then you are assigning travel speed to edges
of road network obtained from OSM. Even if the travel speeds are kept in 
separate table, to use them in routing algorithm you need to define some 
relation between your data and OSM based network, probably some relation 
through Id of edges. 

In this case the travel speeds are in fact additional attribute of OSM 
network edges, even if you keep them in different database table.

As far as I understand the ODbl license and community guidelines, I think 
this kind of relation creates derivative database, where you have Share-
alike obligation (If you are using it publicly). It doesn’t necessarily 
mean, your traffic data will be imported directly to OSM. I think, It means 
you have to publish them under ODbl? Am I wrong?

Karel


---------- Původní zpráva ----------
Od: Simon Poole <simon at poole.ch>
Komu: legal-talk at openstreetmap.org
Datum: 8. 1. 2015 12:43:10
Předmět: Re: [OSM-legal-talk] OSM based GPS navigations and ODbl license of 
OSM data

"Am 07.01.2015 um 13:00 schrieb Henning Hollburg:
> Let's say I have a great source of Floating Car Data (FCD). I'd like to
> use this FCD to calculate precise weights for edges I derived from OSM.
> These edges will be used in an online navigation application later on.

The crux is the "later on" algorithmically combining data/datasets on
device is at least a grey area, specifically if the non-OSM data is
actually dynamic. As a tendency I would lean on the side of the result
being a produced work and that 4.5.b would apply. Naturally you can
create some undesirable corner cases (distributing a diff between OSM
and your OSM+), but that's probably unavoidable and likely not to have
any real consequences.

> Do I need to publish these weights according to the ODbL?

You are never required to publish you original proprietary data, just
the derivative database (if it actually exists).

Simon_______________________________________________
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