[Tagging] default value

[Matej Lieskovský]

1) If we can agree that this is needed, I believe it can be built. We would
need to first agree on a notation (wiki is not machine readable), but the
rest should be fine. Worst case scenario is having a system that takes a
planet.osm file and "expands" it, resulting in a separate server with
periodically recalculated data. Could you link the proposal please?

2) I'd be perfectly happy to not know the difference until someone notices
the map being wrong, but feel free to go ahead with local solutions. Unlike
the defaults system, survey:date is unlikely to actually need a global
consensus.

On 5 January 2018 at 13:44, marc marc <marc_marc_irc at hotmail.com> wrote:

> Le 05. 01. 18 à 13:23, Matej Lieskovský a écrit :
> > Could we perhaps agree that we need a way to list assumed and implied
> > values on a smaller than global level?
>
> there are two problems:
>
> 1) a list of some local default exists (e. g. speed values according to
> the type of road per country). the problem is the lack of a schema to
> assign these values indicated on the wiki to the osm data.
> every router for exemple have his own not-opensource-opendata schema to
> retrive those value.
> there is an unsuccessful default value proposal but unfortunately nobody
> has been working on it for a long time.
>
> 2) Even if this list exists, the other problem Fernando mentioned is
> that it is impossible to tell the difference between someone who added a
> street without checking the details (number of lanes, cycleway, ...)
> that someone who checks a road and fill all tag that are not the same as
> the local default value.
> in this usecase, a key like defaults=checked would be interesting.
> or something like survey:date + survey=default
> otherwise, do not hesitate to suggest a way to indicate that you have
> checked the secondary tags on 200 roads in a city so that another
> contributor knows which street is completely described and which one is
> not. or how to make a one-year check to tag change in oneway street.
>
> My usecase is the trick of marking streetlights when I have completely
> finished a street. since the only one doing it around here, I always
> know witch are still to be done. there should be a more serious way to
> share this kind of information.
>
> Regards,
> Marc
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