[OSM-talk-ie] Coastline on tidal rivers

Dave Foley davefoley at hotmail.com
Tue Jul 6 21:17:54 UTC 2021

If we go off the wiki there is not a full consensus:

There are discussions about where the transition between the sea to a wide river (tagged with waterway<https://wiki.openstreetmap.org/wiki/Key:waterway>=riverbank<https://wiki.openstreetmap.org/wiki/Tag:waterway%3Driverbank>) should occur; there is a view that this should ideally be at the top of the tidal section or the river, but it is also accepted that the junction may be closer to the mouth of the river with the tidal section of the river tagged with tidal<https://wiki.openstreetmap.org/wiki/Key:tidal>=*.

Given that a lot of OSM is based off townlands I think we should be following the BWO maps, if the coastline is moved then it also affect the townlands.


From: Colm Moore <colmmoore72 at hotmail.com>
Sent: Monday 5 July 2021 21:25
To: talk-ie at openstreetmap.org <talk-ie at openstreetmap.org>
Subject: Re: [OSM-talk-ie] Coastline on tidal rivers


Roughty River - I think there is a matter of materiality here. The HWM is about 700 metres east of what is currently mapped. It is a tidal section of river, but it isn't 'open sea'. I think it is a level of discrepancy we can live with. In contrast, the likes of the lower Shannon and Lough Foyle are more characterised as sections of nearly enclosed sea.


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