[OSM-talk-ie] One townland spread across two different areas

[Mark Tully]

I had a similar issue with Ballyboughlin in Offaly.  See
http://maps.openstreetmap.ie/oocmaps.html?zoom=15&lat=53.35462&lon=-7.63757&layers=B0000TFFFFFFFF
and http://www.openstreetmap.org/relation/4122877.

I elected to put both parts into the same relation, ensuring that each part
formed a complete loop in JOSM and marking them all as outers.  The second
section of Ballyboughlin (the "Part of..." section) was entirely surrounded
by Raheen (http://www.openstreetmap.org/relation/4122899), so I marked that
section as an inner in Raheen's relation.

I did it like this as it seemed like the most sensible method to me, but
maybe there's a better way to do it.

Mark

On Tue, Oct 28, 2014 at 12:35 AM, Conor Jones <conor at malinbeg.com> wrote:

> Hi folks,
>
> First off, great to be back on the mailing list and to see a very active,
> committed community alive and kicking
>
> I've started mapping townlands in SW Donegal - and while I went at it with
> all guns blazing... it's damn hard work!
>
>
> I've encountered a few strange occurrence last-night on my maps where the
> one townland is spilt across 2 dis-joined areas
>
> Examples:
>
> Cappagh townland (OSM):
> http://www.openstreetmap.org/relation/4139615#map=16/54.6334/-8.6459
>
> Cappagh townland  (OSI 25"):
> http://maps.osi.ie/publicviewer/#V1,558685,876576,7,9
>
> I shouldn't use the OSI link but I can't find a method for linking to an
> area on the TCD sheets
>
>
> You'll see that that small townlands of Cappagh and the bordering townland
> of Croaghlin are marked as "part of ..." the larger townlands of the same
> name just off to the West
>
> For now, I have simply created a seperate relation / townland for each
> section and named them the same, which OSM seems to be handling OK... but
> Nominatim will only see one instance it appears. However, I believe that to
> do this correctly, I should use a master relation or somehow merge the
> boundaries of each townland section into one relation
>
> Has anyone encountered similar to this? It seems to be common in the area
> I'm mapping in SW Donegal
>
> Any advice?
>
>
> Cheers,
>
> C
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