<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><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 class="gmail_quote"><div><span style="font-family:sans-serif;font-size:14px">=drain</span><br></div><div><span style="font-family:sans-serif;font-size:14px">suggested: </span><span style="font-family:sans-serif;font-size:14px">Use </span><tt dir="ltr" class="gmail-m_-514649185166939189gmail-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_-514649185166939189gmail-mw-selflink gmail-m_-514649185166939189gmail-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><br></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></div><div><span style="font-family:sans-serif;font-size:14px">suggested: </span><span style="font-family:sans-serif;font-size:14px">Use </span><tt dir="ltr" class="gmail-m_-514649185166939189gmail-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_-514649185166939189gmail-mw-selflink gmail-m_-514649185166939189gmail-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 simple narrow 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. Ditches are usually straight (as opposed to natural streams). They may contain little water or even be dry most of the year – to mark this </span><tt dir="ltr" class="gmail-m_-514649185166939189gmail-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></div></blockquote><div><br></div><div>I don't know if that was done on purpose of by mistake but these definitions are mixed up a bit. It is ditches that are used for irrigation, not drains.</div><div>I would suggest to define them as follows.</div><div><br></div><div>canal - large man-made open flow (free flow vs pipe flow) waterways used to carry useful water for transportation, hydro-power generation, irrigation or land drainage purposes. consider using waterway=ditch for small irrigation or land drainage channels. consider using waterway=drain for small lined superflous liquid drainage channels.</div><div><br></div><div>drain - small artificial free flow waterways usually lined with concrete or similar used for carrying away superflous liquid like rain water or industrial discharge. consider using waterway=ditch for unlined channels used to drain nearby land. consider using waterway=canal for large unlined land drainage channels.</div><div><br></div><div>ditch - small artificial free flow unlined waterways used for irrigating or draining land as well as for deviding land. consider using waterway=canal for large irrigation or land drainage channels. consider using waterway=drain for lined superflous liquid drainage channels.</div><div><br></div><div>No need to introduce any new tags.</div><div><br></div><div>Eugene</div></div></div></div></div></div><br><div class="gmail_quote"><div dir="ltr">ср, 16 янв. 2019 г. в 05:12, Warin <<a href="mailto:61sundowner@gmail.com">61sundowner@gmail.com</a>>:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<div class="gmail-m_6746048398943810355moz-cite-prefix">On 16/01/19 11:53, Graeme Fitzpatrick
wrote:<br>
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<div dir="ltr">On Wed, 16 Jan 2019 at 10:28, Dave
Swarthout <<a href="mailto:daveswarthout@gmail.com" target="_blank">daveswarthout@gmail.com</a>>
wrote:<br>
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<div><span class="gmail-m_6746048398943810355gmail-m_1448986718156668615gmail-one-click-content gmail-m_6746048398943810355gmail-m_1448986718156668615gmail-css-14ljr8w gmail-m_6746048398943810355gmail-m_1448986718156668615e1q3nk1v4"><span class="gmail-m_6746048398943810355gmail-m_1448986718156668615gmail-one-click">Although
the 1st definition sort of agrees with your usage,
the common definition in the U.S. is closer to the
other two. There are several other definitions given
but most of them are similar to those two. So it
will be a bit confusing to use here in the U.S.</span></span></div>
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<div>Now why does that amaze me! :-)</div>
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<div><span style="color:rgb(0,0,0);font-size:25.2px;font-weight:700">irrigation
channel: </span><span style="color:rgb(0,0,0);font-size:14px">a </span><a href="https://www.macmillandictionary.com/dictionary/british/passage" class="gmail-m_6746048398943810355gmail-QUERY" title="passage" style="margin:0px;padding:0px;border:0px;font-size:14px;text-decoration-line:none;color:black" target="_blank">passage</a><span style="color:rgb(0,0,0);font-size:14px"> </span><a href="https://www.macmillandictionary.com/dictionary/british/dug" class="gmail-m_6746048398943810355gmail-QUERY" title="dug" style="margin:0px;padding:0px;border:0px;font-size:14px;text-decoration-line:none;color:black" target="_blank">dug</a><span style="color:rgb(0,0,0);font-size:14px"> in the </span><a href="https://www.macmillandictionary.com/dictionary/british/ground_1" class="gmail-m_6746048398943810355gmail-QUERY" title="ground" style="margin:0px;padding:0px;border:0px;font-size:14px;text-decoration-line:none;color:black" target="_blank">ground</a><span style="color:rgb(0,0,0);font-size:14px"> and </span><a href="https://www.macmillandictionary.com/dictionary/british/used" class="gmail-m_6746048398943810355gmail-QUERY" title="used" style="margin:0px;padding:0px;border:0px;font-size:14px;text-decoration-line:none;color:black" target="_blank">used</a><span style="color:rgb(0,0,0);font-size:14px"> for </span><a href="https://www.macmillandictionary.com/dictionary/british/bring" class="gmail-m_6746048398943810355gmail-QUERY" title="bringing" style="margin:0px;padding:0px;border:0px;font-size:14px;text-decoration-line:none;color:black" target="_blank">bringing</a><span style="color:rgb(0,0,0);font-size:14px"> </span><a href="https://www.macmillandictionary.com/dictionary/british/water_1" class="gmail-m_6746048398943810355gmail-QUERY" title="water" style="margin:0px;padding:0px;border:0px;font-size:14px;text-decoration-line:none;color:black" target="_blank">water</a><span style="color:rgb(0,0,0);font-size:14px"> to </span><a href="https://www.macmillandictionary.com/dictionary/british/land_1" class="gmail-m_6746048398943810355gmail-QUERY" title="land" style="margin:0px;padding:0px;border:0px;font-size:14px;text-decoration-line:none;color:black" target="_blank">land</a><span style="color:rgb(0,0,0);font-size:14px"> in </span><a href="https://www.macmillandictionary.com/dictionary/british/order_1" class="gmail-m_6746048398943810355gmail-QUERY" title="order" style="margin:0px;padding:0px;border:0px;font-size:14px;text-decoration-line:none;color:black" target="_blank">order</a> <span style="color:rgb(0,0,0);font-size:14px">to </span><a href="https://www.macmillandictionary.com/dictionary/british/make_1" class="gmail-m_6746048398943810355gmail-QUERY" title="make" style="margin:0px;padding:0px;border:0px;font-size:14px;text-decoration-line:none;color:black" target="_blank">make</a><span style="color:rgb(0,0,0);font-size:14px"> </span><a href="https://www.macmillandictionary.com/dictionary/british/plant_1" class="gmail-m_6746048398943810355gmail-QUERY" title="plants" style="margin:0px;padding:0px;border:0px;font-size:14px;text-decoration-line:none;color:black" target="_blank">plants</a><span style="color:rgb(0,0,0);font-size:14px"> </span><a href="https://www.macmillandictionary.com/dictionary/british/grow" class="gmail-m_6746048398943810355gmail-QUERY" title="grow" style="margin:0px;padding:0px;border:0px;font-size:14px;text-decoration-line:none;color:black" target="_blank">grow</a> </div>
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<br>
OSM gives a distinction between river and stream.<br>
There should be a similar distinction between 'drain' etc. <br>
It should not be base on the flow of water as that could be hard to
determine - especially if the water is off when mapping.<br>
<br>
For example, 'a drain can be easily stepped over'?<br>
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