On Thu, 2014-08-28 at 13:52 -0300, John Packer wrote: > For a street, there is no practical difference nowadays > between "no" > and "unset", which is a smell for me. Either way means no. > For the software? No, there isn't a difference. > For the mapper? Yes, there is a difference. > > > Since nowadays NULL for a street means oneway=no a change in > the > semantics would be still be possible as far as the database is > concerned. If you go today to the database and update all > oneway > attributes for streets which are blank to "no", the meaning of > the > database is equivalent. > Theorically speaking, yes, you could add oneway=no to every street, > and get a functionally equivalent database (from the software's POV). > > But, in practice, people most likely wouldn't agree with that (this > change would be reverted). > +1
To use add oneway=no in selected areas to confirm the road has been surveyed is fine, but not everywhere as that causes tag clutter and makes it difficult for a mapper to see the important tags. Phil (trigpoint) > > > 2014-08-28 12:33 GMT-03:00 Xavier Noria <f...@hashref.com>: > On Thu, Aug 28, 2014 at 5:21 PM, Simon Poole <si...@poole.ch> > wrote: > > > In any case there are roughly 45 million highway segments on > which a > > oneway tag could make sense, vs. roughly 6 million > oneway=yes and 1.5 > > million oneway=no. I suspect that it is really -far- too > late to change > > the semantics of this specific attribute. > > > Since nowadays NULL for a street means oneway=no a change in > the > semantics would be still be possible as far as the database is > concerned. If you go today to the database and update all > oneway > attributes for streets which are blank to "no", the meaning of > the > database is equivalent. > > Same for motorways, replace all NULLs with "yes". Equivalent > database. > > For a street, there is no practical difference nowadays > between "no" > and "unset", which is a smell for me. Either way means no. > > I believe the default is useful for the UI, to preselect a > value for > example so that the user has to do nothing in the majority of > street > creations, less useful as a way to interpret NULLs because > then you > don't know what has been confirmed. > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
