[OSM-legal-talk] License clarification

[Christoph Hormann]

On Wednesday 06 June 2018, Andrew Pon wrote:
> [...]
>
> Given that we are using open street maps to just remove pixels at an
> early stage of processing, would we be able to just put a statement
> in our written reports saying that open street maps was used in this
> masking process, or would we have to make our final displacement
> database freely available?

Two things are important here IMO:

* in any case attribution will be required for any public use of the 
data in the form required by the ODbL unless you can argue that use of 
OSM data is insubstantial.

* if you would need to make available your data set under an open 
license depends on if there is a derivative database containing both 
OSM and non-OSM data somewhere in your process.  If what you do is just 
masking the water areas in visualizations of your data the answer to 
that is clearly no.  But if you mask the data early in a more elaborate 
process and do further processing afterwards based on a data set that 
is an inseparable combination of both data sources the situation is not 
that clear.

-- 
Christoph Hormann
http://www.imagico.de/