<html><head></head><body>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.<br>
<br><br><div class="gmail_quote">On May 12, 2015 4:47:54 AM CDT, Martin Koppenhoefer <dieterdreist@gmail.com> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div dir="ltr"><div class="gmail_extra"><br /><div class="gmail_quote">2015-05-10 14:19 GMT+02:00 Volker Schmidt <span dir="ltr"><<a href="mailto:voschix@gmail.com" target="_blank">voschix@gmail.com</a>></span>:<br /><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><i>pebbles</i> 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. </blockquote></div><br /><br />reading several sources it appears to me that gravel is rounded too, the wiki seems wrong here: <br /><a href="http://wiki.openstreetmap.org/wiki/Key:surface">http://wiki.openstreetmap.org/wiki/Key:surface</a> wrong picture and wrong description, wrong size specification...<br /><br /></div><div class="gmail_extra">FWIW, pebbles seem to be a subset of gravel (grain size):<br /><br />granular gravel (2 to 4 mm)<br />pebble gravel (4 to 64 mm)</div><div
class="gmail_extra"><br />cheers,<br /></div><div class="gmail_extra">Martin<br /></div></div>
<p style="margin-top: 2.5em; margin-bottom: 1em; border-bottom: 1px solid #000"></p><pre class="k9mail"><hr /><br />Tagging mailing list<br />Tagging@openstreetmap.org<br /><a href="https://lists.openstreetmap.org/listinfo/tagging">https://lists.openstreetmap.org/listinfo/tagging</a><br /></pre></blockquote></div><br>
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