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

[Donal Diamond]

On 15 May 2015 at 20:49, Killian Driscoll <killiandriscoll at gmail.com> wrote:

>
> At the SW side of Lough Allen the pre-drainage scheme lake level contained
> an island called Inishfale Island with the townland of Derrynadooey to the
> west. This contains a national monument RO002-028 (
> http://webgis.archaeology.ie/NationalMonuments/FlexViewer/) which is
> listed
> as townland: Inishfale Island; you can see that the map the national
> monuments is using respects the pre-drainage shoreline townland outline.
> The traced townland on the osm
>
> http://www.openstreetmap.org/?mlat=54.0715&mlon=-8.0517#map=16/54.0715/-8.0517
> of Derrnadooey now subsumes Inishfale Island, so the official sites and
> monuments record (which was incorrect, as there is no such townland as
> Insihfale Island) now conflicts with the townland name provided by osm.
>

This is resolvable  -  the island still exists as a townland.

What you do is:

1) Create 'Inishfale Island' townland as normal (with way(s) as role outer)
2) add the way(s) of 'Inishfale Island' to Derrnadooey with role inner,
this creates a hole in Derrnadooey

For example here's Beggerin Island which was an island before  drainage
created the Slobs in Wexford

http://www.townlands.ie/wexford/shelmaliere-east/north-west-slob/
http://www.townlands.ie/wexford/shelmaliere-east/beggerin-island/

Hope this helps

D