Rory - I don't think you can, because the negative area is area with both no ground elevation/displacement and no water body. There would be no way to tell whether the negative area was water body data or simply no displacement.
On Thu, Jun 7, 2018 at 4:41 AM Rory McCann <r...@technomancy.org> wrote: > On 07/06/18 00:44, Kathleen Lu wrote: > > The way I understand the use, the OSM data is used to identify areas > > that are to be discarded. Data in those areas are discarded. Thus, the > > OSM data is not kept either, and no OSM data in the final dataset. Thus, > > there is no derivative database containing OSM data. > > You can look for areas in the dataset with no data, and construct OSM > (water body) data from that. > > > _______________________________________________ > legal-talk mailing list > email@example.com > https://lists.openstreetmap.org/listinfo/legal-talk >
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