[Tagging] maxwidth vs. maxwidth:physical vs. width

Martin Vonwald imagic.osm at gmail.com
Mon Feb 16 09:42:30 UTC 2015


Hi!

I just stumbled upon the wiki article regarding maxwidth:physical. From
reading it - and the articles about maxwidth and width - I don't really
understand when to use each key.

My understanding so far:
* width: this is the actual width of a feature
* maxwidth: this is a legal limitation; nothing wider than the given value
may use the feature
* maxwidth:physical: according to the wiki page: a physical limit

The width of a feature in my understanding is a physical limit. So when
should maxwidth:physical be used? One example I can think of might be a way
with varying width, i.e. it is not possible to specify "width" and
maxwidth:physical should be used to specify the minimum width along the
way. Another one might be the maximum width of a vehicle, that may pass a
barrier (this is indicated in the first sentence of the article).

Is this the intention of maxwidth:physical?

Some additional examples and a section "When to use" might be helpful.

best regards,
Martin
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