<br>Good to have a proper discussion on the subject.<br><br>There does seem to be a a massive consensus around the world that maxspeed should be used to hold a posted speed limit in km/h or mph as a numeric in the local units. (this is based on current practice as indicated by ITO Map and by taginfo). There is a smattering of countrycode:zone, but it is small. The only major use is in Romania.<br>
<br>There seems to be a mood to use maxspeed:type for the supporting countrycode:zone data here, although more people are using source:maxspeed for this globally. I have continued to use maxspeed:type in my cleanup pass because in a number of cases the source:maxspeed already contained something like 'survey', 'sign at S end' or similar.<br>
<br>I suggest that we raise a proposal at some point to migrate the zone information to maxspeed:type, but lets not worry about that for now.<br><br>What we can discuss here is how to tag the UK speed limits.<br><br>Based on the dilemma I have had numerous times in the past week to decide is a slip-road or roundabout is technically a 60mph or 70mph I would suggest that we produce some guidance on what value to use in various situations (even though it is a bit irrelevant and nerdy for most situations we could imagine). I tag slip roads at the dual carriageway speed if at least one end is on a dual-carriageway. I tag roundabouts as 70mph if there are at least two dual-carriageways attached to them. I use 60 mph in other situations.<br>
<br>Given that it is not always 100% clear if a road is 'dual' or 'single', I suggest that we simply use use a value 'UK:national' in maxspeed:type (or in source:maxspeed). This would be in place of uk:motorway, uk:nsl_single and uk:nsl_dual. To be clear, the tag should be uk:national not just national given the strong guidance on the wiki and through usage that it is appropriate to include a country-code prefix.<br>
<br>Fyi, I am very nearly done with my maxspeed cleanup. Only a few smaller roads to go.<br><br>Keep up the good work.<br><br>I now realise that a simple way to capture a speed limit and its location as a car passenger is to take a geocoded photo of the sign. It's sad how long it has taken me to twig to that one!<br>
<br><br> <br>Regards,<br><br><br>Peter<br><br><div class="gmail_quote">On 25 September 2012 20:49, Colin Smale <span dir="ltr"><<a href="mailto:colin.smale@xs4all.nl" target="_blank">colin.smale@xs4all.nl</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On 25/09/2012 18:25, Andrew M. Bishop wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
As the author of an OSM data consumer (the router "Routino")<br>
</blockquote></div>
Can I just say how refreshing it is to have some input from the data consumers. Most of the interminable debates about tagging are between parties who talk about data entry issues (how many clicks, how much support in editors etc) and could be sorted far more effectively by considering what people want/expect to get out of the data. If the consumers' point of view is not adequately represented OSM could easily degenerate into WOM (like ROM only it's write-only). Any attempt to limit mappers' creative freedom by "standardisation" is usually met with howls of derision and dogmatic refusal.<br>
<br>
Just my 2c...<span class="HOEnZb"><font color="#888888"><br>
<br>
Colin</font></span><div class="HOEnZb"><div class="h5"><br>
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