-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all,
Just as an aside, this sort of "waterways changing" happens in many places. Ellis Island in New York (yes that one), is partially in the US state of New York, and partially in New Jersey, due to land reclaimation works and a dispute over the original treaty/contract between them. You can see the border of the original island in the administrative border on OSM: http://www.openstreetmap.org/#map=17/40.69880/-74.04098 Read more: http://en.wikipedia.org/wiki/Ellis_Island#State_sovereignty_dispute Rory On 14/05/15 23:10, Killian Driscoll wrote: > I've been working on tracing townlands by Lough Conn, Mayo and > don't know how to deal with some boundaries due to the drop in lake > levels from drainage works. Here http://osm.org/go/etJ86lqw-?m= you > can see that I've left out four townlands: Scotchfort, > Cappanaglogh, Cloonygunnaun, and 'Cappanaglogh (Part Of): you can > see that the latter is between Cappanaglogh, Cloonygunnaun, and > with the lake level change and the inclusion of a previous island > into the townland it's not clear how a new boundary should be > drawn. > > A related issue is whether the boundaries should be redrawn at all > here, or if the original pre-drainage works lake level boundary > should be respected (I looked at Lough Gara and see that the > tracing has followed the new lake level). The GIS townland layer I > have used before has kept the original townland size and not > changed the outline to match the 'new' lake level. > > I'd appreciate advice on this, > > > Killian Driscoll Banting Postdoctoral Fellow Département > d'anthropologie Université de Montréal > > umontreal.academia.edu/KillianDriscoll www.lithicsireland.ie > ca.linkedin.com/in/killiandriscoll > _______________________________________________ Talk-ie mailing > list [email protected] > https://lists.openstreetmap.org/listinfo/talk-ie > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAEBAgAGBQJVWy/KAAoJEOrWdmeZivv2ha4IAKNJCIhdX6/nYYg4QW08uj6M Kbi6fuwBqveSjuIbYr7XJmrJ/kmJg1aTTOne0EchySiFfCNvhwFnEhzC7sehw4aV sEmVwmmgwVWGxo/NCbfJfy8DqXHCnJTj774Ittwdg+svaGjxyrY4qXzPZwvZlqhU qwl8mYXqdN3YUNXGTEFFT761jtelwi2aYBA8rn9u7m/qt/BGz9zgHXb0heji+Lo2 dRa4EhDbs5ADaQeTYVFNRfeUxJvYYC0IGzM0gktZOvSb3sM1ctHi05yCGptm7+u7 25H0MAA7XiGhU4BlCJvnlYhw7zsDaof090cHQKvrYcXdkt9KQ+HcCOx4fRufJHU= =+S7B -----END PGP SIGNATURE----- _______________________________________________ Talk-ie mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk-ie
