[Tagging] surface=pebbles -> surface=pebblestone ?

[John F. Eldredge]

In American usage, gravel refers to both rounded and unrounded stones of similar size.  For example, concrete often makes use of crushed stone in the gravel size; it is angular rather than rounded. Pea gravel is often used as an ornamental surface layer for concrete, but not for use within a concrete slab, since it is more expensive.


On May 12, 2015 4:47:54 AM CDT, Martin Koppenhoefer <dieterdreist at gmail.com> wrote:
>2015-05-10 14:19 GMT+02:00 Volker Schmidt <voschix at gmail.com>:
>
>> *pebbles* is similar to gravel, only that loose pebbles are used in
>place
>> of the gravel. The pebbles are bigger than the gravel pieces, and
>rounded.
>
>
>
>reading several sources it appears to me that gravel is rounded too,
>the
>wiki seems wrong here:
>http://wiki.openstreetmap.org/wiki/Key:surface  wrong picture and wrong
>description, wrong size specification...
>
>FWIW, pebbles seem to be a subset of gravel (grain size):
>
>granular gravel (2 to 4 mm)
>pebble gravel (4 to 64 mm)
>
>cheers,
>Martin
>
>
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