There's an earlier thread on topic here where conflicting advice was given ;-)
https://lists.openstreetmap.org/pipermail/talk-ie/2014-October/000741.html So looks like it is worthwhile opening up the discussion where we can all agree on a common approach. D On 15 May 2015 at 18:32, Killian Driscoll <killiandrisc...@gmail.com> wrote: > Thanks. "stick with the boundary markings as they exist on the map sheets": > if you scan the lake edges of e.g. Lough Neagh, Gara, Derravaragh, Allen > etc. that have lowered lake levels the traced townland boundaries all now > match the new lake level, so I think the map sheets have been ignored and > new boundaries have been drawn. Maybe others who have been tracing lakes > with dropped lake levels can comment? > > Killian Driscoll > Banting Postdoctoral Fellow > Département d'anthropologie > Université de Montréal > > umontreal.academia.edu/KillianDriscoll > www.lithicsireland.ie > ca.linkedin.com/in/killiandriscoll > > On 15 May 2015 at 13:28, Dave Corley <davecor...@gmail.com> wrote: > > > Hi Killian, > > > > I'm trying to recall what was done in the past for this as I'm sure it's > > come up. > > > > To the best of my recollection, stick with the boundary markings as they > > exist on the map sheets. > > > > Dave > > > > > > On 14 May 2015 22:12, "Killian Driscoll" <killiandrisc...@gmail.com> > > 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 > > > Talk-ie@openstreetmap.org > > > https://lists.openstreetmap.org/listinfo/talk-ie > > > > > _______________________________________________ > > Talk-ie mailing list > > Talk-ie@openstreetmap.org > > https://lists.openstreetmap.org/listinfo/talk-ie > > > _______________________________________________ > Talk-ie mailing list > Talk-ie@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-ie > _______________________________________________ Talk-ie mailing list Talk-ie@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ie
