Volker Schmidt wrote: > Going back to the original example, I would say, not only the lock but > the entire cut, in particular way > https://www.openstreetmap.org/way/243353333 > should be tagged as waterway=canal. This scheme applies to most river-lock > arrangements, the "cuts" are nearly almost artificial canals.
Yes. There's a very big difference from a boating point of view. Taking my home river as an example, the River Severn, a lock cut such as the one upstream of Holt Lock makes the approach very easy: https://www.openstreetmap.org/#map=17/52.26849/-2.26653 Boating on this is exactly like boating on a canal. There is no discernible current and you can simply hover in midchannel while the lock is prepared for you (all locks on the Severn are keeper-operated). Compare this to Gloucester Lock: https://www.openstreetmap.org/#map=18/51.86538/-2.25197 Here there is no canal approach from upstream - you're straight off the river into the lock. If you try to hover in midchannel then you will get swept over Llanthony Weir and River Canal Rescue will have to come and Tirfor your boat off, which happens two or three times a year to the great embarrassment of the boat-owner. Consequently you are asked to phone the lock-keeper in advance so that he can prepare the lock for you and you can motor straight in. There are lots of warnings about this both off and online, and rightly so (https://canalrivertrust.org.uk/refresh/media/thumbnail/27339-new-river-severn-navigation-guide-april-2016.pdf, https://www.canalworld.net/forums/index.php?/topic/95567-ship-lock-gloucester/&tab=comments#comment-2121288, http://www.severn-boating.co.uk/sharp.htm etc.). On some of the larger American river navigations the lock structures are built right within the main river channel - such as this new $3bn (!) lock on the Ohio River: https://en.wikipedia.org/wiki/Olmsted_Locks_and_Dam - so similar caution to Gloucester would apply, particularly in times of high flow. On a major navigation like that you'd be expected to use VHF to keep in contact with the lock-keepers, of course. So there is a very big difference between locks with a canal approach and no canal approach, and that should be reflected in the tagging. Richard (boat-owner, regular contributor and former editor of Waterways World, former editor of British Waterways' website, founder of Melton Mowbray Navigation restoration project yadda yadda yadda) -- Sent from: http://gis.19327.n8.nabble.com/Tagging-f5258744.html _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging