<html><head></head><body><div class="ydp1092eb61yahoo-style-wrap" style="font-family: verdana, helvetica, sans-serif; font-size: 13px;"><div><div dir="ltr" data-setdir="false">While you observe quality problems with imports, you can contribute to better document these problems with samples of buildings ( list of osm_id and brief description of observations ).<br></div><div class="ydp1092eb61signature"><span style="font-style:italic;color:rgb(0, 0, 191);font-weight:bold;"> <br><font style="background-color: inherit;" face="garamond, new york, times, serif">Pierre </font><br></span></div></div>
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Le vendredi 2 août 2019 23 h 34 min 17 s UTC−4, AntiCompositeNumber <anticompositenumber@gmail.com> a écrit :
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<div><div dir="ltr">In my area, it also appears that the detection rate is fairly good. In<br clear="none">my brief look through I found one building where there is no building<br clear="none">and a few buildings that the AI did not find. The rotation issue was<br clear="none">fairly common as well as a general offset from the imagery (This may<br clear="none">be on the Mapbox side, I don't know). The footprints get the general<br clear="none">shape of the building mostly there, but struggle with smaller<br clear="none">sections. Overall, the tool seems to be good at saying "There is a<br clear="none">building here and it's about this big" but is less successful at<br clear="none">identifying the details of the buildings.<br clear="none"><br clear="none">On Fri, Aug 2, 2019 at 8:17 PM Jmapb <<a shape="rect" href="mailto:jmapb@gmx.com" rel="nofollow" target="_blank">jmapb@gmx.com</a>> wrote:<br clear="none">><br clear="none">> On 8/2/2019 7:24 AM, Darafei "Komяpa" Praliaskouski wrote:<br clear="none">> > Here's a demo by azavea showing how 125 Million AI-mapped buildings<br clear="none">> > relate to 33 Million buildings currently in OpenStreetMap in the same<br clear="none">> > region.<br clear="none">> ><br clear="none">> > <a shape="rect" href="https://demos.azavea.com/building-footprint-comparison/#4.4/38.67/-93.93" rel="nofollow" target="_blank">https://demos.azavea.com/building-footprint-comparison/#4.4/38.67/-93.93</a><br clear="none">><br clear="none">> Thanks, this is interesting.<br clear="none">><br clear="none">> Browsing the areas I'm most familiar with in NYC (where we had a<br clear="none">> building footprint import from city data in 2013), I find that the<br clear="none">> buildings that are detected by Microsoft but missing from OSM are mostly<br clear="none">> either already demolished buildings (currently mapped as<br clear="none">> landuse=construction), small outbuildings, or simply nonexistent. In the<br clear="none">> cemetery, Microsoft has picked out a few of the more impressive tombs<br clear="none">> and mausoleums. And in one case Azavea seems to have failed to notice a<br clear="none">> building that's been mapped in OSM for years (since the import.)<br clear="none">><br clear="none">> Browsing more rural areas in upstate NY, I see thousands of unmapped<br clear="none">> buildings, mostly houses, that Microsoft successfully detected -- in<br clear="none">> some cases despite tree cover. The sizes are pretty good and the<br clear="none">> footprints are okayish. Oddly some of them seem slightly rotated, maybe<br clear="none">> a trick of the shadows.<br clear="none">><br clear="none">> J<br clear="none">><br clear="none">><br clear="none">> _______________________________________________<br clear="none">> talk mailing list<br clear="none">> <a shape="rect" href="mailto:talk@openstreetmap.org" rel="nofollow" target="_blank">talk@openstreetmap.org</a><br clear="none">> <a shape="rect" href="https://lists.openstreetmap.org/listinfo/talk" rel="nofollow" target="_blank">https://lists.openstreetmap.org/listinfo/talk</a><div class="ydp60bb60fbyqt9682225660" id="ydp60bb60fbyqtfd35859"><br clear="none"><br clear="none">_______________________________________________<br clear="none">talk mailing list<br clear="none"><a shape="rect" href="mailto:talk@openstreetmap.org" rel="nofollow" target="_blank">talk@openstreetmap.org</a><br clear="none"><a shape="rect" href="https://lists.openstreetmap.org/listinfo/talk" rel="nofollow" target="_blank">https://lists.openstreetmap.org/listinfo/talk</a><br clear="none"></div></div></div>
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