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bgcolor="#FFFFFF" text="#000000"><div style="font-size:
12pt;font-family: Verdana;">I like the idea of building a consensus on a
building import.<br><br>More seriously if we can get any sort of
consensus I'll be more than happy.<br><br>Cheerio John<br><br><span>Begin
Daniel wrote on 2019-03-21 2:40 PM:</span><br><blockquote type="cite"
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<p class="MsoNormal"><span style="color:#1F497D">Oupsssss, I still miss
the “reply all” button<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm
0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:EN-CA"
lang="EN-US">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:EN-CA"
lang="EN-US">
<a class="moz-txt-link-abbreviated" href="mailto:jfd553@hotmail.com">jfd553@hotmail.com</a> <br>
<b>Sent:</b> Thursday, March 21, 2019 14:36<br>
<b>To:</b> 'Nate Wessel'<br>
<b>Subject:</b> RE: [Talk-ca] Building Import<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Concerning the
pre-processing, let’s try/check first the “orthogonalization” component
then, if there is a consensus on the validity of the result, we can
build on it
</span><span style="font-family:Wingdings;color:#1F497D">J</span><span
style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Daniel<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div>
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0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:EN-CA"
lang="EN-US">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:EN-CA"
lang="EN-US">
Nate Wessel [<a class="moz-txt-link-freetext" href="mailto:bike756@gmail.com">mailto:bike756@gmail.com</a>] <br>
<b>Sent:</b> Thursday, March 21, 2019 14:30<br>
<b>To:</b> John Whelan<br>
<b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:talk-ca@openstreetmap.org">talk-ca@openstreetmap.org</a><br>
<b>Subject:</b> Re: [Talk-ca] Building Import<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p>I've specifically and repeatedly requested that the tasking manager
be taken down while this project is reworked... though that doesn't
pertain directly to the email I just sent.
<o:p></o:p></p>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">Nate Wessel<br>
<span style="font-size:7.5pt;color:#777777">Jack of all trades, Master
of Geography, PhD candidate in Urban Planning<br>
<a href="http://natewessel.com" moz-do-not-send="true">NateWessel.com</a></span>
<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">On 3/21/19 2:02 PM, John Whelan wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-family:"Verdana","sans-serif"">Nate are
you requesting something specific on the Canadian task manager for
Toronto at this time or would you prefer to look through Daniel's work
first?
<br>
<br>
Thanks<br>
<br>
Cheerio John<br>
<br>
Nate Wessel wrote on 2019-03-21 1:49 PM:<o:p></o:p></span></p>
<p><span style="font-family:"Verdana","sans-serif"">Daniel,
<o:p></o:p></span></p>
<p><span style="font-family:"Verdana","sans-serif"">This
is exciting news! After much talk on this list, it seems we may have
some actual progress toward fixing the various data quality issues.
Would you mind sharing some of your code, or a description of your
workflow here or on GitHub or the like so we can take a look? <o:p></o:p></span></p>
<p><span style="font-family:"Verdana","sans-serif"">One
thing you didn't mention which I think will be really critical,
especially in central Toronto: We need to remove buildings from the
import dataset that may already be mapped in OSM. That is, buildings
that overlap with existing buildings. For this import to make any sense
in Central Toronto, we need conflation to move slowly, and in smaller,
more manageable steps. Buildings that are already mapped should be
checked manually at a later time in batches that
a skilled human can manage in less than an hour. The tasking manager as
it's currently set up would have all of downtown conflated by hand in
one task by a single mapper - a recipe for disaster I'm sure, given how
detailed the map is in that area.
<o:p></o:p></span></p>
<p><span style="font-family:"Verdana","sans-serif"">Cheers,<o:p></o:p></span></p>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-family:"Verdana","sans-serif"">Nate
Wessel<br>
</span><span
style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:#777777">Jack
of all trades, Master of Geography, PhD candidate in Urban Planning<br>
<a href="http://natewessel.com" moz-do-not-send="true">NateWessel.com</a></span><span
style="font-family:"Verdana","sans-serif"">
<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Verdana","sans-serif"">On
3/19/19 12:58 PM, Begin Daniel wrote:<o:p></o:p></span></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><p
class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal">As mentioned a few weeks ago, I have almost
completed the development of a clean-up tool for the data to be
imported.<o:p></o:p></p>
<p class="MsoNormal">So far, it removes nonessential vertices,
orthogonalizes building corners when reasonable and ensures walls’
alignment within given tolerances. Building footprints that can’t be
processed completely are flagged accordingly, so they could
be examined thoroughly at import time.<o:p></o:p></p>
<p class="MsoNormal">Eventually, It should be easy to remove overlapping
buildings (potentially generated from a 3d mapping), but I doubt that
splitting terrace into individual buildings can be done automatically.
<o:p></o:p></p>
<p class="MsoNormal">The tool uses some parameters that need to be
adjusted. I would like that those who are interested in this aspect of
the import send me benchmark data that could be problematic. I will
process them to adjust parameters and/or the tool,
and I will send back the results to the sender for a thorough
examination.<o:p></o:p></p>
<p class="MsoNormal">I should soon document the process in the “Canada
Building Import” wiki page (in a pre-processing section).<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Thought? Comments?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Daniel<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-CA"><o:p> </o:p></span></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>Talk-ca mailing list<o:p></o:p></pre>
<pre><a href="mailto:Talk-ca@openstreetmap.org" moz-do-not-send="true">Talk-ca@openstreetmap.org</a><o:p></o:p></pre>
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<pre>_______________________________________________<o:p></o:p></pre>
<pre>Talk-ca mailing list<o:p></o:p></pre>
<pre><a href="mailto:Talk-ca@openstreetmap.org" moz-do-not-send="true">Talk-ca@openstreetmap.org</a><o:p></o:p></pre>
<pre><a href="https://lists.openstreetmap.org/listinfo/talk-ca" moz-do-not-send="true">https://lists.openstreetmap.org/listinfo/talk-ca</a><o:p></o:p></pre>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-CA"><o:p> </o:p></span></p>
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<br><fieldset class="mimeAttachmentHeader"></fieldset><br><pre wrap="">_______________________________________________
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