[Imports] Birmingham City Council tree import

[Martin Koppenhoefer]

2017-05-15 23:36 GMT+02:00 Andy Mabbett <andy at pigsonthewing.org.uk>:

> > the point is, while a mapper can use any tags he wants, an import
> shouldn't
> > introduce any new tags but rather use established tags in a way they are
> > already defined.
>
> Where was this "rule" agreed and where is that documented? What is the
> justification for it?
>



it is part of the import guidelines:
https://wiki.openstreetmap.org/wiki/Import/Guidelines#Use_the_right_tags




>
> > "min_age" relates to the min_age of the people attending the feature.
> > It is defined like this.
>
> Since no people "attend" trees, this would appear to be a wholly
> unnecessary distinction.
>



yes, the point was: don't use "age" as you would have to update this every
instant, use a date based tag like the well established start_date which
allows to calculate the age when you need it.




>
> >> - what is usrn? Usually we don't use abbreviations in tags.  Already
> >> explained in the original post: Unique Street Reference Number.
> Suggestions
> >> have been to use ref:usrn
> >
> > IMHO there shouldn't be an abbreviation in the tag name, generally, there
> > shouldn't even be a foreign key at all.
>
> If "usrn" is the name used for the ID by the source, it seems
> perfectly reasonable to use the same name in OSM.



actually the name appears to be "Unique Street Reference Number" and usrn
is just an abbreviation for it. This is a tag that codifies an address (the
street where a tree is located) into a new OSM tag, which is rather
pointless, as we already have a spatial reference to the position of the
tree. These reference numbers might be useful to attach to the highway (if
the british comunity decides so), but it doesn't seem to make a lot of
sense adding them to trees.

Cheers,
Martin
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