[OSM-legal-talk] Paid services from OSM

[Dair Grant]

Richard Fairhurst wrote:

>> 4.6 Access to Derivative Databases. If You publicly Use a Derivative Database
>> You must also offer to recipients of the Derivative Database a copy in a
>> machine readable form of: 
>> 
>> a. The entire Derivative Database; or 
>> 
>> b. A file containing all of the alterations made to the Database offered
>>    under this Licence, including any additional Data, that make up all the
>>    differences between the Database and the Derivative Database. 

Assuming I choose option (b), how does this work if the alterations are all
subtractions?

Say I'm converting a planet file for a hand-held device, and truncate all
coordinates to 4 decimal places. If I don't want to publish the format for
my Derivative Database, it sounds like I would need to publish a list like:

   - Add      0.0000123 to   node 23
   - Subtract 0.0000456 from node 42

Perhaps it's not worth treating the "translating the Database to a
less-expressive form" case as different to any other modification case.

But it does seem a bit like jumping through hoops, when it would be simpler
to say "I truncated all coordinates to 4 decimal places" or even "the DD is
a subset of the information in version X of the D, and here's a copy of
that".


-dair
___________________________________________________
dair at refnum.com              http://www.refnum.com/