<div dir="auto"><div>Disclaimer: I suppose I'm a former member of the London OSM community, and now only visit occasionally. <div dir="auto"><br></div><div dir="auto">I'd add that it's worth noting OSM in London has history similar to the city it's self. It's not a typical city/town, but many small villages that expanded & grew with centres that then merged into each other. This is why London has lots of different highstreets/market squares/"downtowns". </div><div dir="auto"><br></div><div dir="auto">OpenStreetMappers in London worked on their local areas from a blank canvas, and started expanding the distance from home/work that they mapped. The mapping distance/radius continues to expand for as long as OSM interest is maintained, or until they think it's reached/met other map areas. If interest is maintained, it might be that they return/reset to 0-distance and start adding different features/detail. The result can be fuzzy halos of data/detail between different mapper's patches. It's hard to casually spot those boundaries of detailed data, particularly because the existing mappers are not regularly visiting the areas (due to the reasons that created the anomalies). </div><div dir="auto"><br></div><div dir="auto">A previous replier referred to "City of London" when I think they meant "Central London". Be careful, because "City of London" is a very specific place and isn't the center or downtown for most people/uses. </div><div dir="auto"><br></div><div dir="auto">As for "Visiting OSMers" and their impact on data maintenance, there are other cities I would pick to look into that. It would be good to look at, and also to see if it can be measured how well a city/community has dealt with it. </div><div dir="auto"><br></div><div dir="auto">From the center of Newcastle, </div><div dir="auto">Gregory. </div><br><div class="gmail_extra"><br><div class="gmail_quote">On 1 Sep 2017 12:29 pm, "Dan S" <<a href="mailto:danstowell%2Bosm@gmail.com">danstowell+osm@gmail.com</a>> wrote:<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>Hi<br><br></div>One specific possibility: I know that at least a handful of people have been deliberately filling out London's buildings, and in un-surveyed areas this is often by tracing building shapes from aerial views. This is motivated by London's "patchy" coverage: areas where mappers live, plus tourist/popular streets, are well-mapped, while other (residential etc) areas sometimes looked blank. Maybe worth checking if the difference you see is due to a specific object type (in particular, building=*).<br></div><div><br></div><div>Best<font color="#888888"><br></font></div><font color="#888888">Dan<br><br></font><div><div><div><div><div class="gmail_extra"><br><div class="gmail_quote"><div class="elided-text">2017-09-01 12:01 GMT+03:00 De Sabbata, Stefano (Dr.) <span dir="ltr"><<a href="mailto:s.desabbata@leicester.ac.uk" target="_blank">s.desabbata@leicester.ac.uk</a>></span>:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="elided-text">
<div bgcolor="white" link="#0563C1" vlink="#954F72" lang="EN-GB">
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<p class="MsoNormal"><span style="color:black">Dear all,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:black"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:black">my name is Stefano, and I am a lecturer in geography at the University of Leicester. Volunteered geographic information and OSM have been one of my research interests for a few years now. I have also done some
very minor contributions to OSM myself, but never in London and I am not very familiar with the London OSM community.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:black"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:black">As I have been recently looking at some aspects data production and quality of OSM in London, and I was wondering whether any of you might have some time to help me out in interpreting some of the data… I have
a couple of maps that can use some local expertise to make sense of them. :)</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:black"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:black">In particular, I am looking at the relationship between feature density and number of edits per features (among other things). It looks like there are areas of London with consistently high density but low average
number of edits per features. I was wondering whether this might be the result of local projects or mapathons organised by the community? Or might there be (and most probably there are) other reasons I am overlooking?</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:black"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:black">If you are interested, please contact me: at
<a href="mailto:s.desabbata@le.ac.uk" target="_blank">s.desabbata@le.ac.uk</a></span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:black"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:black">All the best,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:black">Stefano.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:black"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:black"> </span><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:10.5pt;color:black">Dr Stefano De Sabbata</span></b><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:10.5pt;color:black">Lecturer in Quantitative Geography</span></b><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Department of Geography,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">University of Leicester, University Road, Leicester, LE1 7RH, UK</span><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:10.5pt;color:#c91b00">t: </span></b><span style="font-size:10.5pt;color:black"><a href="tel:+44%20116%20252%203812" value="+441162523812" target="_blank">+44 (0)116 252 3812</a></span><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:10.5pt;color:#c91b00">e:</span></b><span style="font-size:10.5pt;color:black"> <a href="mailto:s.desabbata@le.ac.uk" target="_blank"><span style="color:blue">s.desabbata@le.ac.uk</span></a></span><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:10.5pt;color:#c91b00">w: </span></b><span style="font-size:10.5pt;color:black"><a href="http://www2.le.ac.uk/departments/geography/people/stefano-de-sabbata" target="_blank"><span style="color:blue;background:white">le.ac.uk/departments/geogra<wbr>phy/people/stefano-de-sabbata</span></a></span><u></u><u></u></p>
<p class="MsoNormal" style="background:white"><b><span style="font-size:10.5pt;color:#c91b00">twitter: </span></b><span style="font-size:10.5pt;color:black"><a href="https://twitter.com/maps4thought" target="_blank"><span style="color:blue">@maps4thought</span></a></span><u></u><u></u></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;color:black"> </span><u></u><u></u></p>
<p class="MsoNormal" style="background:white"><b><span style="font-size:10.5pt;color:#222222">Research Associate</span></b><u></u><u></u></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;color:#222222">Oxford Internet Institute, University of Oxford</span><u></u><u></u></p>
<p class="MsoNormal" style="background:white"><u><span style="font-size:10.5pt;color:#0000ee"><a href="http://oii.ox.ac.uk/people/desabbata" target="_blank"><span style="color:blue">oii.ox.ac.uk/people/desabbata</span></a></span></u><u></u><u></u></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;color:#222222"><a href="http://geography.oii.ox.ac.uk/" target="_blank"><span style="color:blue">Information Geographies</span></a></span><u></u><u></u></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;color:#222222"><a href="http://cii.oii.ox.ac.uk/" target="_blank"><span style="color:blue">Connectivity, Inclusion, and Inequality</span></a></span><u></u><u></u></p>
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