[OSM-talk-ie] Query on tracing townlands and dealing with changed lake levels and new boundaries

[Killian Driscoll]

I guess the situation is different as the waterway changes in Ireland have
not caused disputes. The townland boundaries that are set by the commision
have not changed, but in osm we are changing them, and amending the
boundaries to suit the map rather than the official boundary,

Killian Driscoll
Banting Postdoctoral Fellow
Département d'anthropologie
Université de Montréal

umontreal.academia.edu/KillianDriscoll
www.lithicsireland.ie
ca.linkedin.com/in/killiandriscoll

On 19 May 2015 at 08:42, Rory McCann <rory at technomancy.org> wrote:

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> 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 Talk-ie at openstreetmap.org
> > https://lists.openstreetmap.org/listinfo/talk-ie
> >
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