On 2020-08-01 9:26 a.m., Alan Mackie wrote:
Perhaps I am an overly literal follower of the wiki, but I had always assumed the coastline should continue inland as far as the tide continues to be noticeable. Mediterranean mapping might be an issue, but elsewhere I think this is fairly clear?
Starting locally, the Fraser River has a strong tidal influence 25km upstream of the coastline/riverbank edge. Fishers report a tidal influence 90km upstream. Wikipedia says the Columbia has tidal influence up to the first dam, which is 120km upstream of the coastline/riverbank edge. There are tidal forecasts published for 75km upstream of the edge.
Looking in Europe, the Thames is tidal for 80km upstream of the coastline/riverbank edge.
If the water is fresh or the waterway still appears to be a river, canal etc, then it seems reasonable that they should also have those tags as well. The coastline and riverbank tags aren't fighting for a common key, so it's not a direct tagging conflict.
I would consider an area mapped as water both with natural=coastline and waterway=riverbank or natural=water in error. I haven't seen any cases where this is done.
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