----- Original Message -----
From: "Anthony" <[email protected]>
To: "OSM Fork" <[email protected]>; "openstreetmap"
<[email protected]>
Sent: Friday, July 08, 2011 9:24 PM
Subject: [OSM-talk] offering adapted databases
This is an except from a message I sent to Steve. But hopefully
someone can answer these questions for me (and for everyone who wants
to comply with the ODbL):
"If you publicly use any adapted version of this database, or works
produced from an adapted database, you must also offer that adapted
database under the ODbL."
You might be in luck. I see you are quoting from the "human readable "
summary of the ODbL, which is not an accurate summary of the actual licence.
If you look at Clause 4.6 of the actual licence itself [1] you will see you
have three choices either you have to offer
(I) the entire derivative database ; or
(ii) a file containing all of the alterations made to the Database; or
(iii) the method of making the alterations to the Database (such as an
algorithm), including any additional Contents, that make up all the
differences between the Database and the Derivative Database.
It may well be that option (iii) is best suited to you needs.
For instance say you produce a paper map from a planet file , it would seem
you might comply with the spirit of the licence by stating which date planet
file you used, and how that file was then used to produce any further
derivative database that you used to produce the map. I don't think this
would comply with the letter of the licence, but is at least in the spirit
of it.
How long do I have to keep a copy of the adapted database in case
someone takes me up on my offer? How much of the database do I need
to keep? Is the offer valid to third parties? If person A makes a
bunch of tiles from a database, and person B prints out a map from
those tiles and gives the map to person C, who offers person C the
copy of the adapted database? (Person B likely doesn't have a copy,
but Person A would have to keep a ton of obsolete data indefinitely if
his offer is valid to third parties.)
It would depend on who was making the tiles and the print outs "publicly
available" It is the person who makes the produced work publicly available
who has to comply with clause 4.6. So if A made the tiles publicly
available he would have to comply, and if B printed out the map, and then
made that map publicly available he would have to comply as well.
Regards
David
[1] http://opendatacommons.org/licenses/odbl/1.0/
As of right now I have produced hundreds of thousands of tiles from a
myriad of different versions of a myriad of different databases. If
someone asked me to give them a copy of the adapted database, I
couldn't possibly comply.
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