On 2019-03-13 15:44, Sergio Manzi wrote: > On 2019-03-13 15:27, Mateusz Konieczny wrote: >> >> >> >> Mar 13, 2019, 12:53 PM by s...@smz.it: >> >> On 2019-03-13 12:15, Tom Pfeifer wrote: >>> I think you misunderstand. OSM is based on locally sourced, handcrafted >>> data. That creates the high quality. >> >> That's totally inaccurate. >> >> The reality is that OSM is based on imported data, augmented by locally >> sourced information (/of ///sometimes /questionable quality/). >> >> Sergio >> >> [citation needed] >> >> It may be true in some rare regions, in many cases real mapping requires >> deletion of substandard >> imports dumped into OSM (see TIGER mess in USA, low quality landcover in >> Slovakia making >> mapping a horrible experience). >> >> Describing OSM as "imported data, augmented by" is as far as I known >> complete misrepresenting the >> situation. > > I haven't said that OSM *is* imported data, but that it is *based on* > imported data: that's different. And I never said that the "augmentation" > contributed by mappers is of irrelevant importance (/even if sometime the > quality is sub-par/). > > Have mappers walked along the whole world coastlines? Have they descended all > world's rivers by canoe? Have all Mumbay, New York, Rome, Shanghai, etc., > streets and alleys been walked by volunteers mapping their location and > names? All the peaks escalated? > > Sergio > ... an example of massively imported data (/which I agree with, btw.../): https://blogs.bing.com/maps/2018-06/microsoft-releases-125-million-building-footprints-in-the-us-as-open-data
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