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<div class="moz-cite-prefix">On 2019-03-13 15:44, Sergio Manzi
wrote:<br>
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<blockquote type="cite"
cite="mid:483e109d-6835-7def-4317-88ba540fc963@smz.it">
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<div class="moz-cite-prefix">On 2019-03-13 15:27, Mateusz
Konieczny wrote:<br>
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<blockquote type="cite" cite="mid:L_rRnMw--7-1@tutanota.com">
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<div style="16px" text-align="left">Mar 13, 2019, 12:53 PM by <a
class="moz-txt-link-abbreviated" href="mailto:smz@smz.it"
moz-do-not-send="true">smz@smz.it</a>:<br>
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<div class="">On 2019-03-13 12:15, Tom Pfeifer wrote:<br>
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<blockquote type="cite">I think you misunderstand. OSM is
based on locally sourced, handcrafted data. That creates the
high quality. <br>
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<p>That's totally inaccurate.<br>
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<p>The reality is that OSM is based on imported data,
augmented by locally sourced information (<i>of </i><i><i>sometimes
</i>questionable quality</i>).<br>
</p>
<p>Sergio<br>
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<div style="16px" text-align="left">[citation needed]<br>
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<div style="16px" text-align="left">It may be true in some rare
regions, in many cases real mapping requires deletion of
substandard<br>
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<div style="16px" text-align="left">imports dumped into OSM (see
TIGER mess in USA, low quality landcover in Slovakia making <br>
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<div style="16px" text-align="left">mapping a horrible
experience).<br>
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<div style="16px" text-align="left">Describing OSM as "imported
data, augmented by" is as far as I known complete
misrepresenting the<br>
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<div style="16px" text-align="left">situation.</div>
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<p>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 (<i>even if sometime the quality is sub-par</i>).<br>
</p>
<p>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?</p>
<p>Sergio<br>
</p>
</blockquote>
<p>... an example of massively imported data (<i>which I agree with,
btw...</i>):
<a class="moz-txt-link-freetext" href="https://blogs.bing.com/maps/2018-06/microsoft-releases-125-million-building-footprints-in-the-us-as-open-data">https://blogs.bing.com/maps/2018-06/microsoft-releases-125-million-building-footprints-in-the-us-as-open-data</a><br>
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