[Tagging] Gravel (was "Re: Tagging Digest, Vol 68, Issue 35", and before that "surface=pebbles -> surface=pebblestone ?")

[SomeoneElse]

On 12/05/2015 12:19, Martin Koppenhoefer wrote:
>
> 2015-05-11 18:14 GMT+02:00 Volker Schmidt <voschix at gmail.com 
> <mailto:voschix at gmail.com>>:
>
>     I only now, after having lived for many years in the UK, I realise
>     that the definition of gravel is wider than the equivalent of the
>     German Splitt. I thought them equivalent.
>
>     Looking it up in the English Wikipedia I found contradictory
>     information.
>
>     In
>     http://en.wikipedia.org/wiki/Gravel_road
>     "gravel" is "crushed stone" and raoughly aequivalent to the German
>     Splitt
>
>     But in
>     http://en.wikipedia.org/wiki/Gravel
>     "gravel" is more generic and can, for example,  also be pebbles of
>     different sizes.
>
>
>
>
> from my researches it seemed that gravel was completely different to 
> Splitt and wouldn't contain it. But I now have looked at yet another 
> dictionary and it seems to be included (because "pounded" is likely a 
> synonym for "crushed" here):
> http://www.oxforddictionaries.com/definition/english/gravel
>
> So my conclusion is that gravel can be either naturally worn or 
> crushed stone and is about the grain size. Please note that "Splitt" 
> is only appropriate for crushed stone, otherwise you would have to use 
> "Kies" (pebbles).

I'd agree that "it's all about the grain size".  The wikipedia page* 
that's already been linked mentions the Krumbein scale that I vaguely 
remember from college.

When tagging surfaces in OSM I personally try not to use too many 
different values - if there's something vaguely appropriate in the top 
entries here I'd use that:

http://taginfo.openstreetmap.org.uk/keys/surface#values

note that that's the .org.uk taginfo not the .org one - there have been 
relatively few imports and mechanical edits there so it's a better 
representation of "what the surveying mapper actually tagged", though a 
similar country taginfo for a country with few imports and mechanical 
edits should do just as well.

Cheers,

Andy

* http://en.wikipedia.org/wiki/Grain_size



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/tagging/attachments/20150512/9cc3c3a2/attachment-0001.html>