[OSM-legal-talk] Regarding community guidelines for map layers

[Matt Morrow]

> there seems to be a contradiction:
> if your renderer/preprocessing alters one DB based on another (eg
> removing elements from one, based on elements of the other one),
> derivative DB kicks in. whether the DB are connected at preprocessing
> stage or merely in cache of renderer does not matter. they are not
> independent.
>
> a complete different situation would be, if renderer just draws icons on
> top of each other (eg using the second stage to draw bigger icons, which
> will probably overwrite first stage icons). then the DB are independent.

That is in contradiction to the Open Data License/Use Cases page.

"Can one freely arrange data within a Collective Database as appropriate
for the application

When a programmer is working with OSM and data from other sources and
thereby creates a Collective Database they will want to be free to arrange
the combined data in the most appropriate form for their purpose. We
believe that this should be allowed so long as merged database itself is
not being published."

(answer) "The non-OSM parts of a collective database do not need to be
published."

http://wiki.openstreetmap.org/wiki/Open_Data_License/Use_Cases#Can_one_freely_arrange_data_within_a_Collective_Database_as_appropriate_for_the_application

Matt
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