<div dir="ltr"><div dir="ltr">Hi Joseph,<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Le mer. 29 mai 2019 à 01:55, Joseph Eisenberg <<a href="mailto:joseph.eisenberg@gmail.com" target="_blank">joseph.eisenberg@gmail.com</a>> a écrit :<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
I'm a little confused about how to decide when to use tunnel=flooded<br>
vs tunnel=yes with waterway=canal or other free-surface-flow<br>
waterways. Is this tag meant to replace all instances of tunnel=yes<br>
for large waterways, or are there situations when tunnel=yes with<br>
waterway=canal would still be needed?<br></blockquote><div><br></div><div>As mentioned on wiki Talk, look at those two pictures regarding waterway and tunnels :</div><div>tunnel=flooded : <a href="https://wiki.openstreetmap.org/w/images/9/91/Waterway_drain_outlet.jpg" target="_blank">https://wiki.openstreetmap.org/w/images/9/91/Waterway_drain_outlet.jpg</a></div><div>tunnel=yes : <a href="https://www.pamline.com/sites/pamline_en/files/pose_en_galerie_tuyau_aep_gros_dn.jpg" target="_blank">https://www.pamline.com/sites/pamline_en/files/pose_en_galerie_tuyau_aep_gros_dn.jpg</a></div><div><br></div><div>Additionally you can look at this for waterway=canal + tunnel=yes</div><div><a href="https://files1.structurae.de/files/photos/3076/dscn6606.jpg" target="_blank">https://files1.structurae.de/files/photos/3076/dscn6606.jpg</a></div><div><br></div><div>tunnel=flooded + man_made=pipeline isn't so recommended because it means that the pipeline is inside a flooded tunnel.</div><div>It occurs when the tunnel is dug under groundwater level (I know at least one tunnel like this in Paris)</div><div>Or here as a penstock runs inside an underground tailrace canal : <a href="https://www.openstreetmap.org/way/319267776">https://www.openstreetmap.org/way/319267776</a></div><div><br></div><div>Nevertheless, this doesn't solve situations like this : <a href="https://www.guerrillaexploring.com/gesite/public_html/images/guerrilla/GES011/GES011-11.jpg" target="_blank">https://www.guerrillaexploring.com/gesite/public_html/images/guerrilla/GES011/GES011-11.jpg</a></div><div>Many pipes and cables are in the same tunnel, like many bike lanes, car and bus lanes are on the same bridge.</div><div><br></div><div>Hope it helps</div><div><br></div><div>François</div></div></div>