<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">For a final source tag (i.e. the verified buildings) shouldn't we be using source=OS_OpenData_StreetView as noted in the wiki: http://wiki.openstreetmap.org/wiki/Ordnance_Survey_Opendata#When_tracing_over_OS_StreetView<br><br>--- On <b>Fri, 28/5/10, Roy Jamison <i><xteejyx@googlemail.com></i></b> wrote:<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>From: Roy Jamison <xteejyx@googlemail.com><br>Subject: Re: [Talk-GB] building shapes from OS Street View, with code<br>To: "TimSC" <mapping@sheerman-chase.org.uk><br>Cc: talk-gb@openstreetmap.org<br>Date: Friday, 28 May, 2010, 10:29<br><br><div class="plainMail">Also fuzzer is a bugger to get working and I don't know how to edit the<br>fuzzyselect.py to get it doing what I wanted (i.e. auto-tracing from OS<br>StreetView), so this script
should definitely help!<br><br>On Fri, 2010-05-28 at 10:11 +0100, TimSC wrote:<br>> Hi mappers,<br>> <br>> Thanks for the comments on automatic tracing. I have finished an <br>> implementation and it is ready for testing. It runs really slowly (30 <br>> minutes a tile). Be careful if you try it and don't remove any existing <br>> OSM information (and try not to annoy other mappers). The OS open data <br>> license is also a concern, so keep the source tags where appropriate. <br>> Please limit yourself to areas you are prepared to manually check and <br>> fix. (The LWG are aware of this issue, but don't anticipate problems.) <br>> The python code is here (with a readme file): <br>> <a href="http://timsc.dev.openstreetmap.org/dev/mapseg0.1.tar.gz" target="_blank">http://timsc.dev.openstreetmap.org/dev/mapseg0.1.tar.gz</a><br>> <br>> Let me know if there are any major bugs or possible improvements. I am <br>> not
sure I can put in much time in the short term but I will fix any <br>> major problems. I will do a wiki page eventually for further updates.<br>> <br>> <a href="http://wiki.openstreetmap.org/wiki/Mapseg" target="_blank">http://wiki.openstreetmap.org/wiki/Mapseg</a><br>> <br>> As Ed Avis suggested, I flag suspected errors during the conversion. I <br>> don't use the surrounding pixel colours but there are plenty of other <br>> heuristics that indicate problems. I assume all buildings have at least <br>> 4 sides which are orthogonal. Any non orthogonal buildings will be <br>> flagged for checking.<br>> <br>> I automatically add a source tag "auto_os_street_view". This should be <br>> changed to a different source tag when it has been verified. I suggest <br>> "source=os_street_view" for verified buildings.<br>> <br>> The fuzzer plugin for JOSM is nicely integrated but it operates on the <br>> rectified tiles
which have lower quality images. My approach uses the <br>> original opendata tiles.<br>> <br>> TimSC<br>> <br>> <br>> _______________________________________________<br>> Talk-GB mailing list<br>> <a ymailto="mailto:Talk-GB@openstreetmap.org" href="/mc/compose?to=Talk-GB@openstreetmap.org">Talk-GB@openstreetmap.org</a><br>> <a href="http://lists.openstreetmap.org/listinfo/talk-gb" target="_blank">http://lists.openstreetmap.org/listinfo/talk-gb</a><br><br><br><br>_______________________________________________<br>Talk-GB mailing list<br><a ymailto="mailto:Talk-GB@openstreetmap.org" href="/mc/compose?to=Talk-GB@openstreetmap.org">Talk-GB@openstreetmap.org</a><br><a href="http://lists.openstreetmap.org/listinfo/talk-gb" target="_blank">http://lists.openstreetmap.org/listinfo/talk-gb</a><br></div></blockquote></td></tr></table><br>