<div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">2013/10/16 Christoph Hormann <span dir="ltr"><<a href="mailto:chris_hormann@gmx.de" target="_blank">chris_hormann@gmx.de</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="im">> I've noticed that somebody recently added a rule to distinguish<br>
> waterway=river from waterway=stream on the wiki page for stream, but<br>
> I'm not sure how/where that rule (which is related to how far an able<br>
> person can jump) became commonly accepted?<br>
<br>
</div>I added this to that wiki page but it has been around for a long time<br>
(on <a href="http://wiki.openstreetmap.org/wiki/Key:waterway" target="_blank">http://wiki.openstreetmap.org/wiki/Key:waterway</a> since 2007).<br>
<div class="im"></div></blockquote></div><br><br>Yes, the "rule of thumb" if you can jump over it, it is a stream, is there for a long time. On the other hand this depends how long you can jump (I guess it is safe to asume that a young person with average abilities can jump 3-4 meters, the world record is like 8 something). IMHO our river classification is rather poor at the moment, we have only 2 classes: river and stream but 3 classes for artificial waterways (ditch, drain and canal). My own mapping for rivers uses this rule: where I map there is an official setting what is considered a river (based on different, non-uniform/consistent rules and also on historic reasons), and everything else (if natural) is a stream, regardless whether I could jump over it or not.<br>
<br></div><div class="gmail_extra">cheers,<br>Martin<br></div></div>