Tom, I think the description is rather unclear as to what the polygons are made of. Lars-Daniel's original description made it down like they were OSM polygons combined with each other, or otherwise simplified of details. A quick glance at the website seemed to confirm this. OTOH, his second email says "the edges of many polygons go across areas, where no OSM elements could have been used as a reference." That does make me wonder whether the polygons were actually created from OSM data, with 3rd party data added or not. Looking at the website again, I see a few examples where a polygon does not match the road network, but do appear to match other polygons OSM (assuming that some OSM polygons have been combined or simplified). (Another possibility is that the polygons do not originate from OSM data, but were snapped to the OSM road network for visualization purposes only. I don't think there's enough information to know.) Again, not conducting a comprehensive survey here, but if 95% of the polygons match OSM polygons, then even if there is technically a derivative database, then I think this simply isn't worth our time to investigate. Best, Kathleen
On Sat, Oct 24, 2020 at 2:02 AM Tom Hummel via legal-talk < legal-talk@openstreetmap.org> wrote: > Hi Lars-Daniel, Kathleen, > > > The process doesn't seem to be trivial, since the edges of many polygons > go across areas, where no OSM elements could have been used as a reference. > So OSM dataset has either been changed or augmented using 3rd party > reference (knowledge, imagery, data etc.) to create the product. Those > changes are share-alike by ODbL. > > The Trivial-Transf.-Guideline asks a trivial transformation to be > judged from a non-technical point of view. The quality of the > transformation itself should be non-trivial. > > You explained, how the edges of some polygons go along edges that may > be very difficult to obtain, as they can’t be found within OSM. While > Kathleen seems to assume that they are directly and easily derived from > OSM data. Is that right? > > OTOH that doesn’t seem important under the TTG. The TTG asks us to > estimate the modification or addition itself. You seem to be certain, > the modifications are only possible by combination of 3rd party data > and OSM data. From that perspective, they don’t seem very trivial to me. > Kathleen? > > Thanks > > Tom > > _______________________________________________ > legal-talk mailing list > legal-talk@openstreetmap.org > https://lists.openstreetmap.org/listinfo/legal-talk >
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