[OSM-talk-ie] Coastline on tidal rivers
mike.riney at gmail.com
Sun Jul 4 21:32:57 UTC 2021
Thanks everyone for commenting. I am responding to previous comments by
all users using this post:
>From local knowledge I know that the River Roughty high tide point is
indeed at the location where some previous editor had moved the coastline.
Thats the location of the Tinkers Pool co-ords provided by Dave. But I
just don't think the coastline should be set at the high-tide point so I
changed it to be further down-stream.
Yes, there is that historic naming anomaly from the Lansdowne times that
what is properly Kenmare Bay was named as Kenmare River for their own
gain. The coastline should definitely encircle all of Kenmare Bay/River,
and still does after my changes. But the Roughty River is different to
Kenmare River, just flows into it. So the question of where the coastline
and Roughty intersect still remains.
>From the examples provided, the Liffey helps confirm my approach. The
Liffey Weir at Islandbridge is the HWM, but the OSM coastline is at Poolbeg
- the entrance to Dublin port. The changes I have made to Kenmare
coastline match that approach.
mike.riney at gmail.com
On Wed, Jun 30, 2021 at 10:23 PM Colm Donoghue <colm.donoghue at gmail.com>
> The Avoca river is tidal up to the Fert
> On Wed 30 Jun 2021, 21:43 Colm Moore, <colmmoore72 at hotmail.com> wrote:
> > Hi,
> > Many high-water marks coincide with weirs, dams or some form of natural
> > 'rapids' (rapid may be overstating things).
> > On older maps, it will be indicated by “HWM”, “Highest point to which
> > ordinary tides (“O.T.”) flow” or similar. However, those older maps may
> > out of date.
> > As best I can determine.
> > Colm
> > 1. Liffey, weir at Islandbridge, Dublin.
> > 2. Tolka, between Ballybough and Drumcondra.
> > 3. Sluice, Portmarnock Bridge.
> > 4. Broadmeadow, east of Lissenhall Bridge - the estuary is semi-tidal
> > above the railway viaduct at Malahide.
> > 5. Bracken, weir at Balbriggan.
> > 6. Boyne, weirs at Oldbridge House, west of Drogheda.
> > 7. Newry, weir at Newry.
> > 8. Lagan, weir at Belfast city centre. Possibly semi-tidal.
> > 9. Bann, south of Coleraine.
> > 10. Foyle, adjacent to weir at Strabane.
> > 11. Erne, Ballyshannon.
> > 12. Moy, weir at Ballina.
> > 13. Corrib, Galway City Centre.
> > 14. Fergus, weir at Ennis.
> > 15. Shannon, Ardnacrusha Dam / weir at Corbally Baths, Limerick.
> > 16. Bandon, somewhere between Innishannon and weir at Bandon.
> > 17. Douglas / Tramore, Douglas village.
> > 18. Lee, waterworks weir at Lee Road, Cork.
> > 19. Glashaboy, weir at Glanmire village.
> > 20. Owenacurra, footbridge at Midleton village.
> > 21. Blackwater, east of Lismore.
> > 22. Suir, likely the weir west of Carrick-on-Suir, Tipperary.
> > 23. Nore, north of Inistioge.
> > 24. Barrow, weir north of Saint Mullins village.
> > 25. Slaney, likely the weir at Enniscorthy.
> > 26. Dargle, Bray town centre.
> > 27. Dodder, likely the weir at Ballsbridge, Dublin.
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