<div dir="ltr"><div dir="ltr"><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr">On Fri, 22 Feb 2019 at 20:48, Eugene Podshivalov <<a href="mailto:yaugenka@gmail.com">yaugenka@gmail.com</a>> wrote:<br></div></div></div></div></div></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr">The primary concern of mine about the current definitios of drain and ditch is that some people are differentiating them by size.<br><br>or stay close to dictionary definitions which assumes some overlapping between the meanings. Here is an example:<br>drain - a narrow artificial open-air channel that takes away waste liquids or rainwater<br>ditch - a narrow channel dug at the side of a road or field to hold, bring or carry away water<br></div></div></div></div></div></div></div></div></blockquote><div><br></div><div>I'd agree that you can't differentiate between drain & ditch based on size (except they're both smaller / narrower than a canal), but you also can't pick them based on locations - either of them can run alongside a road, or go across a field</div><div><br></div><div>I'd suggest we just stick with the simple definitions based on lined / unlined that I thought we all sort of agreed on, way back up there ^ :-)</div><div><br></div><div>=canal: <span style="font-family:sans-serif;font-size:14px">Use </span><tt dir="ltr" class="gmail-m_-8037001499346559627gmail-mw-content-ltr" style="font-size:1em;font-family:monospace,monospace;direction:ltr;background:rgb(238,238,255);line-height:1.6"><a href="https://wiki.openstreetmap.org/wiki/Key:waterway" title="Key:waterway" target="_blank" style="color:rgb(11,0,128);text-decoration-line:none;background:none">waterway</a>=<a class="gmail-m_-8037001499346559627gmail-mw-selflink gmail-m_-8037001499346559627gmail-selflink" style="color:inherit;text-decoration:inherit;background:none;font-weight:bold">canal</a></tt><span style="font-family:sans-serif;font-size:14px"> for large man-made </span><b style="font-family:sans-serif;font-size:14px">open flow</b><span style="font-family:sans-serif;font-size:14px"> (free flow vs pipe flow) </span><a href="https://wiki.openstreetmap.org/wiki/Waterways" title="Waterways" target="_blank" style="color:rgb(11,0,128);background-image:none;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;text-decoration-line:none;font-family:sans-serif;font-size:14px">waterways</a><span style="font-family:sans-serif;font-size:14px"> used to carry useful water, usually for transportation, but also for hydro-power generation or irrigation purposes</span></div><div><span style="font-family:sans-serif;font-size:14px"><br></span></div><div><span style="font-family:sans-serif;font-size:14px">=drain</span><span style="font-family:sans-serif;font-size:14px">: </span><span style="font-family:sans-serif;font-size:14px">Use </span><tt dir="ltr" class="gmail-m_-8037001499346559627gmail-mw-content-ltr" style="font-size:1em;font-family:monospace,monospace;direction:ltr;background:rgb(238,238,255);line-height:1.6"><a href="https://wiki.openstreetmap.org/wiki/Key:waterway" title="Key:waterway" target="_blank" style="color:rgb(11,0,128);text-decoration-line:none;background:none">waterway</a>=<a class="gmail-m_-8037001499346559627gmail-mw-selflink gmail-m_-8037001499346559627gmail-selflink" style="color:inherit;text-decoration:inherit;background:none;font-weight:bold">drain</a></tt><span style="font-family:sans-serif;font-size:14px"> for artificial </span><a href="https://wiki.openstreetmap.org/wiki/Waterways" title="Waterways" target="_blank" style="color:rgb(11,0,128);background-image:none;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;text-decoration-line:none;font-family:sans-serif;font-size:14px">waterways</a><span style="font-family:sans-serif;font-size:14px">, typically lined with concrete or similar, </span><span style="font-family:sans-serif;font-size:14px">usually </span><span style="font-family:sans-serif;font-size:14px">used to carry water for drainage or irrigation purposes.</span></div><div><span style="font-family:sans-serif;font-size:14px"><br></span></div><div><span style="font-family:sans-serif;font-size:14px">=ditch</span><span style="font-family:sans-serif;font-size:14px">: </span><span style="font-family:sans-serif;font-size:14px">Use </span><tt dir="ltr" class="gmail-m_-8037001499346559627gmail-mw-content-ltr" style="font-size:1em;font-family:monospace,monospace;direction:ltr;background:rgb(238,238,255);line-height:1.6"><a href="https://wiki.openstreetmap.org/wiki/Key:waterway" title="Key:waterway" target="_blank" style="color:rgb(11,0,128);text-decoration-line:none;background:none">waterway</a>=<a class="gmail-m_-8037001499346559627gmail-mw-selflink gmail-m_-8037001499346559627gmail-selflink" style="color:inherit;text-decoration:inherit;background:none;font-weight:bold">ditch</a></tt><span style="font-family:sans-serif;font-size:14px"> for artificial </span><a href="https://wiki.openstreetmap.org/wiki/Waterways" title="Waterways" target="_blank" style="color:rgb(11,0,128);background-image:none;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;text-decoration-line:none;font-family:sans-serif;font-size:14px">waterways</a>, typically unlined, usually<span style="font-family:sans-serif;font-size:14px"> used to </span><span style="font-family:sans-serif;font-size:14px">remove storm-water or similar from </span><span style="font-family:sans-serif;font-size:14px">nearby land. They may contain little water or even be dry most of the year – to mark this </span><tt dir="ltr" class="gmail-m_-8037001499346559627gmail-mw-content-ltr" style="font-size:1em;font-family:monospace,monospace;direction:ltr;background:rgb(238,238,255);line-height:1.6"><a href="https://wiki.openstreetmap.org/wiki/Key:intermittent" title="Key:intermittent" target="_blank" style="color:rgb(11,0,128);text-decoration-line:none;background:none">intermittent</a>=yes</tt><span style="font-family:sans-serif;font-size:14px"> may be used.</span></div><div><br></div>Thanks<div><br></div><div>Graeme</div></div></div>