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18. Sep 2018 01:07 by <a href="mailto:baloo@ursamundi.org" target="_blank" rel="noopener noreferrer">baloo@ursamundi.org</a><br /><blockquote class="tutanota_quote" style="border-left: 1px solid #93A3B8; padding-left: 10px; margin-left: 5px;"><div><div><div class="gmail_quote"><div>On Mon, Sep 17, 2018 at 4:42 PM Tobias Zwick <<a href="mailto:osm@westnordost.de" target="_blank" rel="noopener noreferrer">osm@westnordost.de</a>> wrote:</div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex ; border-left: 1px solid rgb( 204 , 204 , 204 ) ; padding-left: 1ex">
In order to find an optimal and future proof tagging schema for default<br />
speed limits, I believe that first extensive research have to be done to<br />
find out what exists in the world, what has to be considered. Also, for<br />
default speed limits to be actually used and understood by data<br />
consumers, meta information needs to be collected about how to translate<br />
road types to actual default speeds per vehicle type for each<br />
country/region.<br />
I started this (both) here, if you want to help, you are welcome:<br />
<a href="https://wiki.openstreetmap.org/wiki/Default_speed_limits" target="_blank" rel="noopener noreferrer">https://wiki.openstreetmap.org/wiki/Default_speed_limits</a></blockquote><div><br /></div><div>This is a Sisyphean task even by OSM standards.</div><div><br /></div><div>Just in my state, Oklahoma, there's 597 towns, 77 counties and at least 2 councils of governments (a regional government type thing between multiple cities), for about 46,000 possible sets of default rules. In <i>one state</i>, and a rural one at that. Out of 50.</div></div></div></div></blockquote><p><br /></p><p>Note that <br /></p><p><br /></p><p>(1) USA is rather unusual in this fragmentation</p><p>(2) local rules are overriding rules of upper administrative level, right?</p><p> so one would need to record 597 + 77 + 2 sets of rules (in the worst case)<br /></p><p>(3) How you got this 46,000 number? It looks like result of multiplying 597 and 77.</p><p> Are you sure that each of 597 towns is partially located in each of 77 counties? <br /></p> </body>
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