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<p>The grey area (particularly since you are doing this at the end
of the processing chain) is really if the end result is a
produced work or not (the third kind of derivative you can have in
the ODBL), because if it is, then 4.5 b. kicks in</p>
<p> <i>b. Using this Database, a Derivative Database, or this
Database as</i><i><br>
</i><i> part of a Collective Database to create a Produced Work
does not</i><i><br>
</i><i> create a Derivative Database for purposes of Section 4.4;
and</i></p>
<p>now if the result was just a map rendering we wouldn't be having
this discussion, even though it could be argued that a bitmap is a
database of pixel colour values. Angels on a pin head anyone?</p>
<p>I would, as a tendency, in this case lean in the direction that
the output is such a produced work (that certain parts of OSM
could be recreated from the output is no different than any other
rendering of OSM data). If we assume that as true, your
obligations would be to provide attribution and, on demand,
provide the water polygons that you used for the masking.</p>
<p>Simon<br>
<i></i></p>
<p><br>
</p>
<br>
<div class="moz-cite-prefix">Am 07.06.2018 um 19:09 schrieb Andrew
Pon:<br>
</div>
<blockquote type="cite"
cite="mid:CAMzhTsN0UJLGc2VOsk9vvBU=O3jEY-gHt7q3E-yjrTe0fhejdg@mail.gmail.com">
<div dir="ltr">Thanks to everybody for helping me with clarifying
the license.
<div><br>
</div>
<div>To answer some of the questions that came up, we would be
masking water bodies at the end of our processing chain, once
we had already derived rates for all of the pixels. There are
also a few other masking steps that would be run around the
same time (typically based on some signal to noise property),
such that a customer wouldn't be able to tell if a pixel was
masked out because it was a water body or if it was masked for
some other reason. As such, from the previous discussion, I
take it that this means that we don't have to freely
distribute our product?</div>
<div><br>
</div>
<div>If we use the OSM data for water masking, we would
definitely make sure to include a written notice in all of our
reports clearly stating that we have used the OSM data for
water masking and that the OSM data is available under the
Open Database License. </div>
<div><br>
</div>
<div>Sincerely,</div>
<div>Andy</div>
</div>
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