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<p>Just a general remark on the technical issue that sparked of this
discussion: squaring buildings is not primarily about improving
data quality. Non-square buildings are simply visually annoying
when rendered, so much that I support squaring them "as a rule"
too when it can reasonably be assumed that there are 90° angles in
the actual building outline. But I'm not kidding myself that it
improves "quality". If we wanted to define quality of building
outlines in OSM we would probably be talking about deviations from
the buildings footprint area, average deviations from the outline
and so on, any of these could be very small even without squaring.
Actually, squaring might impact them negatively, particularly when
the outline is rough, but as said: square buildings are just so
much easier on the eyes :-).</p>
<p>Simon<br>
</p>
<div class="moz-cite-prefix">Am 10.05.2019 um 21:05 schrieb Pierre
Béland via talk:<br>
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<div>May 20 2019 at 14 h 02 min 51 s UTC−4, Stefan Keller
<a class="moz-txt-link-rfc2396E" href="mailto:sfkeller@gmail.com"><sfkeller@gmail.com></a> wrote :
<div><br>
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> Trying to get focus back on the thread topic.<br
clear="none">
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> Storing hints like nosquare=yes (or square=no) is not
best practice of<br clear="none">
> data curation on w worldwide level.</div>
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<div>I dont think either that this is the solution. We have
to look where these problems come and try to correct from
the source. Adding such tag will not help software tools
to identify where we have problems and can create some
missunderstanding about its meaning. And experienced
mappers are more and more reluctant to correct inprecise
building mapping.<br>
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<div>For Newbies, Building Quality Analysis last year this
show some Tasking Manager projects with some 60% of
unsquarred buldings (see <a
href="https://opendatalabrdc.github.io/Blog/#!Database_Quality_Analysis_Tasking_Manager.md"
rel="nofollow" target="_blank" class=""
moz-do-not-send="true">https://opendatalabrdc.github.io/Blog/#!Database_Quality_Analysis_Tasking_Manager.md</a>).
<br>
</div>
<div>The same problem for the DR Congo Ebola response in
november where we had to restart mapping Butembo in an
emergency response and restrict mapping to experienced
mappers.<br>
</div>
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<div><br>
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<div>For an editor like iD, it can participate with other
solutions like better training to assure that Newbies
understand what Building tracing really mean and give then
some feedback, like for example saying before save "You have
10 over 12 buildings that are unsquarred. If you dont know
how to make rectangular buildings, you should ask for help
before you continue. Do you want to send data anyway ?"<br>
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<div><br>
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<div>We have the same problem with some Building import
projects and I think that this needs to be fixed where it
originates, before it goes in the database. For newbies,
this mean more training and monitoring in particular in the
context of Mapathons.</div>
<div><br>
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<div>For Imports, this mean to analyze carefully and correct
the data before the Import.<br>
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<div class="ydp1d108a83signature"><span
style="font-style:italic;color:rgb(0, 0,
191);font-weight:bold;"> <br>
<font face="garamond, new york, times, serif">Pierre </font><br>
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