<br><br><div class="gmail_quote">On 15 April 2011 02:36, Kai Krueger <span dir="ltr"><<a href="mailto:kakrueger@gmail.com">kakrueger@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div class="im"><br>
Steve Doerr-2 wrote:<br>
><br>
> On 09/04/2011 08:15, Peter Miller wrote:<br>
><br>
>> maxspeed:type=GB:dual_carriageway (or GB:motorway, GB:rural, GB:urban)<br>
><br>
<br>
</div>according to <a href="http://taginfo.openstreetmap.de" target="_blank">taginfo.openstreetmap.de</a> there are 72 000 source:maxspeed and<br>
only 552 maxspeed:type. So at least according to the data source:maxspeed is<br>
what mappers have agreed upon.<br>
<br>
Yes, I don't really like the source:maxspeed either, as source has<br>
traditionally been the meta information of how data has been surveyed and<br>
not the on the ground / legal reason for a tag value.<br>
<br>
In the name of consistency, should one not stick to the "accepted method"<br>
though? Otherwise we might keep on going down the same path as with the<br>
"highway=footway" "highway=path" inconsistencies.<br>
<br>
Or perhaps we can do a mass bot-update of source:maxspeed to maxspeed:type?<br></blockquote><div><br>Kai,<br><br>Thank you for your contributions to this discussion. Very helpful.<br><br>I do agree that 'source:maxspeed' is far more widely used than 'maxspeed:type' and that there is as a result a valid argument that we should retain source:maxspeed for that purpose. However... it is not the conventional use for a 'source:xxx' tag and will create confusion and doubt for mappers in the future on what the source tag is for. It also begs the question as to where one should put the source information, ie 'survey' or 'TfL speed database' for maxspeed.<br>
<br>Incidentally, TfL is a good example because as they do seem to have a good attitude to releasing their speed database. It could be worth contacting them to see if we could use it...<br><br>"Over the last few years, London has achieved considerable reductions in
casualties resulting from road traffic collisions. We are exploring new
technology for low cost ways to achieve further reductions<br><br>"One of the key challenges in realising a new generation of speed
management systems is the ability to accurately let the systems know
what the speed limit is across London. To address this challenge TfL
have produced, and will continue to maintain, a digital map of all
London's speed limits.
<p>"This will be made available free of charge to anyone who wishes to
use the map for personal use, or to create commercial applications.</p>"A beta Advisory ISA system is now available for public download,
including source code released under the GNU license. Only users who are
comfortable testing software and realise that beta software may contain
bugs and still require development should consider using this
application. Furthermore you should be prepared for TfL to seek feedback
on your experience with the application.<br><br>"Along with the source code of our application, we are making available
Point of Interest (POI) files to allow developers to create applications
for other common satellite navigation systems.<br><br>"A Keyhole Markup Language (KML) version of the ISA map is also available
which can be used in conjunction with Microsoft Live Maps or other GIS
applications.<br><br><a href="http://www.tfl.gov.uk/corporate/projectsandschemes/7893.aspx">http://www.tfl.gov.uk/corporate/projectsandschemes/7893.aspx</a><br><br><br><br>Regards,<br><br><br><br>Peter<br><br> <br></div>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<br>
Kai<br>
<font color="#888888"><br>
<br>
--<br>
View this message in context: <a href="http://gis.638310.n2.nabble.com/Maxspeed-tagging-for-the-UK-tp6245995p6274975.html" target="_blank">http://gis.638310.n2.nabble.com/Maxspeed-tagging-for-the-UK-tp6245995p6274975.html</a><br>
</font><div class="im">Sent from the Great Britain mailing list archive at Nabble.com.<br>
<br>
_______________________________________________<br>
</div><div><div></div><div class="h5">Talk-GB mailing list<br>
<a href="mailto: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></div></blockquote></div><br>