[Tagging] barrier enforcing maxwidth

[Colin Smale]

Sorry Martin, are you agreeing with me or disagreeing? Supporting or
undermining? It's rather difficult to tell. 

Regarding maxwidth:physical, the examples in the wiki are actually from
Finland where they apparently have explicit signs for the physical
width. 

--colin 

On 2015-09-08 11:50, Martin Koppenhoefer wrote: 

> sent from a phone 
> 
> Am 08.09.2015 um 09:09 schrieb Colin Smale <colin.smale at xs4all.nl>:
> 
>> This is overloading the maxwidth tag - sometimes it means legal, sometimes it means physical.
> 
> maxwidth is a legal limit, typically signposted. 
> 
>> This distinction needs to be crystal clear as it can be a matter of life and death (emergency vehicles can ignore legal limits but not physical ones...) so making its semantics so context-dependent is not a good idea... 
>> 
>> maxwidth:physical is being used to tag the actual available width
> 
> the maxwidth:physical tag was introduced IIRR by Latin American mappers because in their country there are 2 kinds of signposted widths/heights (i.e. in these countries also maxwidth:physical is signposted) 
> 
>> - which by the way is not the same as the distance between the kerbs or the width of the whole carriageway including paths/grass etc. That may be better tagged using width=* but the description of that in the wiki is not particularly clear.
> 
> width is OK in some contexts, but as it refers to the object it is tagged on, it is not working in others like bollards for instance (would denote the width of the bollard, not of the opening). I'd use maxwidth:physical for those cases (even if not signposted). 
> 
> maxwidth:legal is just a synonym for maxwidth (IMHO), rarely used and introduced for symmetry reasons by the people that advocated for maxwidth:physical . 
> 
> cheers  
> Martin  
> 
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