<html><head></head><body><div class="ydp8e2afe53yahoo-style-wrap" style="font-family:times new roman, new york, times, serif;font-size:16px;"><div><div dir="ltr" data-setdir="false">Interesting... ...but also weird.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">They haven't stolen it from OSM (in my street, at least, because I have surveyed and numbered all the houses in OSM and it doesn't copy that). </div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Google Maps has numbers on some houses, no numbers on others. Then it also has a sequence of odd numbers evenly spaced on the centre-line of the road, which look as though they have been interpolated. Unfortunately, the real numbering is a bit odd; on the evens side 2, 4, 6, 8, 10, 12, 14, <side road junction> 30, 32, 34, 36.... and on the odd side 1, 3, 5, 7, 9, 11, 13, 15, 17.. <big gap including 2 side roads>, 25, 27.. <span><span style="color: rgb(0, 0, 0); font-family: times new roman, new york, times, serif; font-size: 16px;"><big gap including 2 side roads> 31, 33, 35, 37. </span></span> </div><div dir="ltr" data-setdir="false">So the interpolation on the centre line is way out.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Where they show numbers on buildings these are often houses,but include the odd detached garage; I hope nobody is living in the garage in this cold weather!</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">TL;DR It's a mess!</div><div dir="ltr" data-setdir="false"><br></div><div class="ydp8e2afe53signature"><div style="font-family:new times, serif;font-size:16px;"><div>Regards,</div><div dir="ltr">Peter</div><div dir="ltr"><br></div><br></div></div></div>
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On Monday, 28 December 2020, 17:06:21 GMT, Gregory Williams <gregory@gregorywilliams.me.uk> wrote:
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<div><div dir="ltr">At first though I thought that these may have been machine-read, too.<br clear="none">I've taken a brief glance at the house numbering that they have near to<br clear="none">me. Several of the numbers are completely wrong.<br clear="none"><br clear="none">However, I've also spotted places where there are house numbers placed<br clear="none">at a regular interval, but no houses actually exist there (nor ever<br clear="none">did). The actual numbers listed reflect houses that are perhaps 100<br clear="none">metres further along the road and on the other side. Further up the<br clear="none">same road there's numbers at a different regular spacing. Those are<br clear="none">situated roughly in the right area of the road, but spaced out perhaps<br clear="none">30% too much compared with the actual house spacing.<br clear="none"><br clear="none">I'd hazard that these have perhaps come from some source where the<br clear="none">extent of the house numbers for a span between junctions are known<br clear="none">(e.g. perhaps the houses on the corners of the junctions), and linearly<br clear="none">interpolated from that.<br clear="none"><br clear="none">I also notice places where the houses are set back a bit further from<br clear="none">the road centre-line, due to the nature of the junction there. The<br clear="none">numbers for the houses have been projected onto the road's centre-line, <br clear="none">rather than on the buildings themselves. A few properties further<br clear="none">along, where they're closer to the road, the numbers have been placed<br clear="none">roughly near the properties instead of on the road centreline.<br clear="none"><br clear="none">Gregory<br clear="none"><br clear="none">On Mon, 2020-12-28 at 16:34 +0000, Jez Nicholson wrote:<br clear="none">> Interesting....<br clear="none">> <br clear="none">> My first guess is that house numbers are machine read from StreetView<br clear="none">> images.<br clear="none">> <br clear="none">> The positioning of the numbers is slightly irratic. Some are on the<br clear="none">> centre of houses, some near the front, some are outside. Maybe<br clear="none">> indicating multiple sources.... Some houses have numbers twice.<br clear="none">> <br clear="none">> On Mon, 28 Dec 2020, 16:24 Rob Nickerson, <<a shape="rect" href="mailto:rob.j.nickerson@gmail.com" rel="nofollow" target="_blank">rob.j.nickerson@gmail.com</a>><br clear="none">> wrote:<br clear="none">> > Hi all,<br clear="none">> > <br clear="none">> > I just spotted that Google Maps has added house numbers to their<br clear="none">> > map of the UK. They are all over the place - does anyone recognise<br clear="none">> > the source?<br clear="none">> > <br clear="none">> > What can we do to improve coverage of addresses in OSM? I notice<br clear="none">> > that we have some pretty good aerial imagery now. Should we see if<br clear="none">> > we can get good building outline from an AI / machine learning<br clear="none">> > approach? If the quality is good we can then use these to help add<br clear="none">> > addresses. For example we can ask new mappers to add addresses<br clear="none">> > using tools such as StreetComplete.<br clear="none">> > <br clear="none">> > Any thoughts much appreciated. I have a feeling that if we can come<br clear="none">> > up with a plan we may be able to get some help from several of the<br clear="none">> > big tech companies now interested in the UK. It would be better if<br clear="none">> > we were steering this rather than it happening to us.<br clear="none">> > <br clear="none">> > Best wishes,<br clear="none">> > Rob<br clear="none">> > _______________________________________________<br clear="none">> > Talk-GB mailing list<br clear="none">> > <a shape="rect" href="mailto:Talk-GB@openstreetmap.org" rel="nofollow" target="_blank">Talk-GB@openstreetmap.org</a><br clear="none">> > <a shape="rect" href="https://lists.openstreetmap.org/listinfo/talk-gb" rel="nofollow" target="_blank" fg_scanned="1">https://lists.openstreetmap.org/listinfo/talk-gb</a><div class="ydpd0d32aeayqt8120500100" id="ydpd0d32aeayqtfd84737"><br clear="none">> <br clear="none">> _______________________________________________<br clear="none">> Talk-GB mailing list<br clear="none">> <a shape="rect" href="mailto:Talk-GB@openstreetmap.org" rel="nofollow" target="_blank">Talk-GB@openstreetmap.org</a><br clear="none">> <a shape="rect" href="https://lists.openstreetmap.org/listinfo/talk-gb" rel="nofollow" target="_blank" fg_scanned="1">https://lists.openstreetmap.org/listinfo/talk-gb</a><br clear="none">_______________________________________________<br clear="none">Talk-GB mailing list<br clear="none"><a shape="rect" href="mailto:Talk-GB@openstreetmap.org" rel="nofollow" target="_blank">Talk-GB@openstreetmap.org</a><br clear="none"><a shape="rect" href="https://lists.openstreetmap.org/listinfo/talk-gb" rel="nofollow" target="_blank" fg_scanned="1">https://lists.openstreetmap.org/listinfo/talk-gb</a><br clear="none"></div></div></div>
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