<div dir="ltr"><div dir="ltr"><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr"><br></div></div></div></div></div><div class="gmail_quote"><div dir="ltr">On Tue, 15 Jan 2019 at 23:28, Eugene Podshivalov <<a href="mailto:yaugenka@gmail.com">yaugenka@gmail.com</a>> wrote:<br></div><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 confusion is mainly in the difference between irrigation canals vs irrigation ditches and drainage diches vs drains.<div><br><div><div>In practice wide irrigation channels are called canals whereas small ones are called diches and people tend to tag them as such.</div><div>This tendency is enforced by the fact that canals and diches are rendered in difference size.</div><div>IMO there is no problem here, we should just document this usage properly.</div><div><br></div><div>Drainage diches and drains are confused simply because of their identical definition on the waterway wiki page</div><div><a href="https://wiki.openstreetmap.org/wiki/Key:waterway" target="_blank">https://wiki.openstreetmap.org/wiki/Key:waterway</a>  <br></div><div>drain - An artificial free flow waterway used for carrying superfluous water like storm water...</div><div>ditch - An small artificial free flow waterway used for carrying superfluous water along paths or roads for drainage purposes</div></div></div></div></div></div></div></div></div></div></div></blockquote><div><br></div><div>So, would we all be happy with redoing the various wiki pages along these lines:</div><div><br></div><div>=canal: </div><div><span style="font-family:sans-serif;font-size:14px">current: Use </span><tt dir="ltr" class="gmail-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" style="text-decoration-line:none;color:rgb(11,0,128);background:none">waterway</a>=<a class="gmail-mw-selflink gmail-selflink" style="text-decoration:inherit;color:inherit;background:none;font-weight:bold">canal</a></tt><span style="font-family:sans-serif;font-size:14px"> for 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" style="background-image:none;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;text-decoration-line:none;color:rgb(11,0,128);font-family:sans-serif;font-size:14px">waterways</a><span style="font-family:sans-serif;font-size:14px"> used to carry useful water for transportation, hydro-power generation or irrigation purposes.</span> </div><div><br></div><div>suggested: <span style="font-family:sans-serif;font-size:14px">Use </span><tt dir="ltr" class="gmail-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" style="color:rgb(11,0,128);text-decoration-line:none;background:none">waterway</a>=<a class="gmail-mw-selflink gmail-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" style="background-image:none;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;color:rgb(11,0,128);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></div><div><span style="font-family:sans-serif;font-size:14px">current: </span><span style="font-family:sans-serif;font-size:14px">Use </span><tt dir="ltr" class="gmail-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" style="text-decoration-line:none;color:rgb(11,0,128);background:none">waterway</a>=<a class="gmail-mw-selflink gmail-selflink" style="text-decoration:inherit;color: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" style="background-image:none;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;text-decoration-line:none;color:rgb(11,0,128);font-family:sans-serif;font-size:14px">waterways</a><span style="font-family:sans-serif;font-size:14px">, typically lined with concrete or similar, used to carry superfluous water like storm water or grey-discharge.</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">suggested: </span><span style="font-family:sans-serif;font-size:14px">Use </span><tt dir="ltr" class="gmail-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" style="text-decoration-line:none;color:rgb(11,0,128);background:none">waterway</a>=<a class="gmail-mw-selflink gmail-selflink" style="text-decoration:inherit;color: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" style="background-image:none;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;text-decoration-line:none;color:rgb(11,0,128);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></div><div><span style="font-family:sans-serif;font-size:14px">current: </span><span style="font-family:sans-serif;font-size:14px">Use </span><tt dir="ltr" class="gmail-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" style="text-decoration-line:none;color:rgb(11,0,128);background:none">waterway</a>=<a class="gmail-mw-selflink gmail-selflink" style="text-decoration:inherit;color: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" style="background-image:none;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;text-decoration-line:none;color:rgb(11,0,128);font-family:sans-serif;font-size:14px">waterways</a><span style="font-family:sans-serif;font-size:14px"> used to drain nearby land, to remove storm-water or similar. 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-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" style="text-decoration-line:none;color:rgb(11,0,128);background:none">intermittent</a>=yes</tt><span style="font-family:sans-serif;font-size:14px"> may be used.</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">suggested: </span><span style="font-family:sans-serif;font-size:14px">Use </span><tt dir="ltr" class="gmail-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" style="text-decoration-line:none;color:rgb(11,0,128);background:none">waterway</a>=<a class="gmail-mw-selflink gmail-selflink" style="text-decoration:inherit;color: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" style="background-image:none;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;text-decoration-line:none;color:rgb(11,0,128);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-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" style="text-decoration-line:none;color:rgb(11,0,128);background:none">intermittent</a>=yes</tt><span style="font-family:sans-serif;font-size:14px"> may be used.</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">New category</span></div><div><span style="font-family:sans-serif;font-size:14px">=channel</span></div><div><span style="font-family:sans-serif;font-size:14px">Use </span><tt dir="ltr" class="gmail-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" style="color:rgb(11,0,128);text-decoration-line:none;background:none">waterway</a>=<a class="gmail-mw-selflink gmail-selflink" style="color:inherit;text-decoration:inherit;background:none;font-weight:bold">channel</a></tt><span style="font-family:sans-serif;font-size:14px"> for small man-made </span><b style="font-family:sans-serif;font-size:14px">open flow</b><span style="font-family:sans-serif;font-size:14px"> </span><a href="https://wiki.openstreetmap.org/wiki/Waterways" title="Waterways" 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 irrigation purposes. Channels are usually straight, but can be either lined or unlined.</span><span style="font-family:sans-serif;font-size:14px"><br></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">Would something like that clarify matters?</span></div><div><span style="font-family:sans-serif;font-size:14px"><br></span></div><div>Thanks<div><br></div><div>Graeme</div></div></div></div>