<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">I can't think of a way to pull in all the suspect buildings but if you have a look here:</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br></div><div class="gmail_default"><font face="verdana, sans-serif"><a href="https://www.openstreetmap.org/search?query=k4a%201m7%20canada#map=19/45.47095/-75.48696">https://www.openstreetmap.org/search?query=k4a%201m7%20canada#map=19/45.47095/-75.48696</a></font><br></div><div class="gmail_default"><font face="verdana, sans-serif"><br></font></div><div class="gmail_default"><font face="verdana, sans-serif">556, 558, 560 are all examples that I think would fail your test. However they are the shape of the buildings.</font></div><div class="gmail_default"><font face="verdana, sans-serif"><br></font></div><div class="gmail_default"><font face="verdana, sans-serif">As far as I am aware we haven't had any outraged users complaining about the building shapes in Ottawa and that I think is the acid test. The Ottawa building import has been useful certainly in gaining new mappers and adding tags to the outlines.</font></div><div class="gmail_default"><font face="verdana, sans-serif"><br></font></div><div class="gmail_default"><font face="verdana, sans-serif">Your test originally was to pick out very badly mapped buildings that had been done in iD and I would agree with you that some were very bad. Sometimes 3 or 4 times the size of the building and some very odd shapes indeed. From memory most were done on HOT tasks with the iD editor.</font></div><div class="gmail_default"><font face="verdana, sans-serif"><br></font></div><div class="gmail_default"><font face="verdana, sans-serif">These I </font><span style="font-family:verdana,sans-serif">think we should definitely aim to avoid but where the representation of the building is reasonably accurate then I think they are acceptable. We are using reasonably experienced mappers who would balk at importing some of the stuff we saw in Nepal etc and rightly so. They'd almost certainly</span><span style="font-family:verdana,sans-serif"> be very vocal about the quality of the data.</span></div><div class="gmail_default"><font face="verdana, sans-serif"><br></font></div><div class="gmail_default"><font face="verdana, sans-serif">There is a case to be made that most residential buildings would be acceptable if they were mapped with the JOSM buildings_tool plugin and all the small blobs take up database size. There is also a case that you get a better sense of the building with the small blobs, bay windows etc. I don't have strong feelings either way but I strongly suspect there are examples of both already in OSM in Canada.</font></div><div class="gmail_default"><font face="verdana, sans-serif"><br></font></div><div class="gmail_default"><font face="verdana, sans-serif">I note that both Google and Bing have most buildings these days and it has almost become a map user expectation. Certainly there are apps that guide blind people that use the building outlines in OSM. There is a case that says to keep up with the competitors we really ought to have buildings.</font></div><div class="gmail_default"><font face="verdana, sans-serif"><br></font></div><div class="gmail_default"><font face="verdana, sans-serif">I think someone else has commented that parts of the Microsoft building outline from scanned images in the US is problematic.</font></div><div class="gmail_default"><font face="verdana, sans-serif"><br></font></div><div class="gmail_default"><font face="verdana, sans-serif">So given the results in Ottawa are comparable to Ontario and in my opinion Ottawa is acceptable then I think the rest is also acceptable. Certainly Kingston where not all building angles were right angles weren't noticeable to me by eye or perhaps my eyesight is just getting worse with age.</font></div><div class="gmail_default"><font face="verdana, sans-serif"><br></font></div><div class="gmail_default"><font face="verdana, sans-serif">Cheerio John</font></div><div class="gmail_default"><font face="verdana, sans-serif"><br></font></div><div class="gmail_default"><font face="verdana, sans-serif"><br></font></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, 31 Jan 2019 at 19:51, Pierre Béland <<a href="mailto:pierzenh@yahoo.fr">pierzenh@yahoo.fr</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div class="gmail-m_7699842330696065489ydpc67a7f06yahoo-style-wrap" style="font-family:verdana,helvetica,sans-serif;font-size:13px"><div><div>Salut John,</div><div><br></div><div>Voici les résultats d'analyse de géométrie des bâtiments pour Ottawa centre-ville.</div><div>bbox : <span>45.4224,-75.6994,45.4568,-75.6122</span></div><div><span></span><br></div><div>- 20,372 Bâtiments<br></div><div><span><div>- 173 Bâtiments avec superposition (0.1%)<br></div></span><div>- 11,534 Bâtiments avec formes irrégulières (56.6%)<br></div><div><br></div><div>Nous avons donc un résultat semblable aux imports en Ontario que j'ai analysé il y quelques jours. A mon avis, en haut de 5%, il faut regarder de plus près et expliquer pourquoi autant de formes irrégulières.<br></div><div><br></div><div class="gmail-m_7699842330696065489ydpc67a7f06signature"><div>J'ai créé des Requêtes overpass pour extraire les bâtiments identifiés dans l'analyse. Télécharger les requêtes à partir des fichiers ci-joints.<span style="font-style:italic;color:rgb(0,0,191);font-weight:bold"> </span></div><div><span style="font-style:italic;color:rgb(0,0,191);font-weight:bold"></span><br></div><div><br></div><span style="font-style:italic;color:rgb(0,0,191);font-weight:bold"><font face="garamond, new york, times, serif">Pierre </font><br></span></div></div><div><span>
<div><br></div></span><br></div><div>173 Batiments avec superposition<br></div><div><div>Req Overpass voir</div><div><a href="https://www.dropbox.com/s/fp1cimouhhfbm9s/on_Ottawa_centre_2019-01-31_batiments_superposes_OSM_req_Overpass.txt?dl=0" rel="nofollow" target="_blank">https://www.dropbox.com/s/fp1cimouhhfbm9s/on_Ottawa_centre_2019-01-31_batiments_superposes_OSM_req_Overpass.txt?dl=0</a></div><div><br></div><div><br></div><span></span><div><span><span><div>11,534 Bâtiments avec formes irrégulières (56.6%)<br></div></span></span><div><div><span>Req Overpass voir</span></div><div><span> <a href="https://www.dropbox.com/s/c68nb9dbudtp679/on_Ottawa_centre_2019-01-31_batiments_irreg_OSM_req_Overpass.txt?dl=0" rel="nofollow" target="_blank">https://www.dropbox.com/s/c68nb9dbudtp679/on_Ottawa_centre_2019-01-31_batiments_irreg_OSM_req_Overpass.txt?dl=0</a></span></div><div><br></div><div><br></div><div><br></div></div><div><span><br></span></div><span><br></span><br></div><div>-------------------------------------------------------------------------------------<br></div></div></div><div><br></div>
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Le lundi 28 janvier 2019 09 h 17 min 37 s HNE, john whelan <<a href="mailto:jwhelan0112@gmail.com" target="_blank">jwhelan0112@gmail.com</a>> a écrit :
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<div><div id="gmail-m_7699842330696065489ydpafd1baeyiv1277836031"><div><div dir="ltr"><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small">Interesting, although I'm not sure what the best approach is. </div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br clear="none"></div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small">31 Hamilton is interesting. If you look at the buildings next to it they don't have house numbers. Look at the history and you'll see it was first created in 2010 with potlatch and edited once more in 2011.</div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br clear="none"></div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small">At my first glance at Kingston the small deviations form 90 degrees did not stand out. </div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br clear="none"></div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small">I think we can reasonably expect Microsoft to create a Canadian buildings file and you seem to be comfortable that the ones it has in the US are of a reasonable standard.</div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br clear="none"></div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small">Part of my background is large databases and my personal view is the minimum data needed the faster the system runs and less data needs to get flipped round and backed up.</div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br clear="none"></div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small">Could you run the analysis over Ottawa?</div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br clear="none"></div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small">Looking closely at a few in Ottawa I note that there are some bay windows and other small features I might not have bothered with if mapping with JOSM with the buildings_tool. Because of a few 45 degree angles involved this isn't something that can be easily solved.</div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br clear="none"></div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small">Ottawa I think at some level can be considered a reasonable success. Certainly we added a lot of extra information to the building outlines.</div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br clear="none"></div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small">I think the trade off is using the municipal data gives us the buildings with perhaps more detail than I might like but many would like to see the buildings imported.</div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br clear="none"></div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small">Dunno (Do not know for translate tools.)</div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br clear="none"></div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small">What is the ideal building outline in OpenStreetMap?</div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br clear="none"></div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small">What is an acceptable building outline in OpenStreetMap? <br clear="none"></div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br clear="none"></div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small">Suggestions</div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br clear="none"></div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small">Thanks</div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br clear="none"></div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_default" style="font-family:verdana,sans-serif;font-size:small">Cheerio John</div></div><br><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_quote"><blockquote class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div class="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail-m_5269169313036325482ydp842d0bd5yiv7713919613yqt4382069100" id="gmail-m_7699842330696065489ydpafd1baeyiv1277836031gmail-m_5269169313036325482ydp842d0bd5yiv7713919613yqtfd02950">
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