<br><br><div class="gmail_quote">On Fri, Nov 7, 2008 at 5:00 PM, Ben Laenen <span dir="ltr"><<a href="mailto:benlaenen@gmail.com">benlaenen@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div></div><div class="Wj3C7c"><br>
</div></div>"only"... does that mean you're going to revisit all 300000 tracks in<br>
Germany to check whether they allow cars or not? The project of</blockquote><div><br>No. A German track without a motorcar key will get motorcar=no added, assuming the original survey was correct. If the bot identifies itself properly, mappers will know that no new information was introduced.<br>
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dropping segments didn't have to introduce new information out of<br>
nowhere. </blockquote><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
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World-wide only defaults and no country defaults will simply not work:<br>
* certain highways types have certain access rules that are different in<br>
each country, and they can always change later on (and as said before<br>
you won't be able to automagically correct those explicit tags)</blockquote><div><br>It's very unlikely that a way will be affected by such a country wide change.<br><br>It's much more likely that a way was given an incorrect highway tag. If access restrictions are explicitly set, it may mean that the way can still be used for routing.<br>
</div><div> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
* not all countries share the same vehicle types, world-wide defaults<br>
cannot handle that</blockquote><div><br>If we decide that highway=track defaults to snowmobile=no world-wide, then there's no problem in snowmobileless South Africa.<br><br>If we decide that motorcycle=no defaults to moped=no world-wide, then there's no problem in countries where moped is not defined by law.<br>
</div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
* different countries, different implicit rules on tags like<br>
access=destination</blockquote><div><br>??<br> <br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
* if you'd add motorcar=yes by default for each track, then where does<br>
it stop? bicycle=yes, foot=yes, moped=yes, motorcycle=yes... And then<br>
that complete set of tags for each highway in the world for each<br>
vehicle type there might be on this planet. Just the problem with this</blockquote><div><div><br>This thread is about world-wide defaults, but you're now attacking the idea of explicitly tagging restrictions on the disputed highway types.<br>
<br>Either way a small number of highways are affected. And explicit tags will force casual mappers to think about other vehicle types.<br><br>Of course the problem will be reduced if we let motorcycle=yes default to moped=yes as above.<br>
<br>
What about the reverse : You download myregion.osm.bz2, but before you
can upload it to your GPS, you need countless polygons, wiki exports
and libraries.<br>
</div> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
is that by having all this data, you actually *lose* information or<br>
you'd have to introduce foot=implicit_yes when it's a road that<br>
implicitly allows pedestrians. But in that case, you can observe the<br></blockquote></div><br>Perhaps I don't understand : Either a road allows pedestrians, or it doesn't.<br><br>If you have said JOSM preferences enabled and you want to add a track for which you do not know if motorcars are allowed, then you can indicate this by deleting the tag. On the one hand it's counter intuitive (you're in a hurry and you hit enter without deleting the tag). On the other hand it may encourage you to think even though you visited the site on foot (Did you see a signpost, tire tracks or houses ?).<br>
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