[OSM-talk-ie] Coastal Rocks and Boundaries

[Conor Jones]

Thanks folks,

Boggedy got in touch and gave me a very simple tagging scheme (place=islet,
natural=coastline, name=Hairy Rock). He also gave me the examples he done
off the coast

I ran through my area the other evening and re-done all my (terribly
inconsistent) tags as 95% of the rocks I included in my mapping
are insignificant. There's little issue telling if a rock should be a
townland or not as I just follow the TCD sheets for this

One thing that did catch me here was that the sheets show some larger rocks
with ARP data... but no townland boundary or name (example:
http://goo.gl/flsiB0). In this example, while Rathlin O'Birne island
doesn't show the usual dotted townland boundary, it is in fact a townland,
but the smaller rocks to the West of it, to the best of my knowledge, aren't
townlands, yet they do appear to have been measured like such

I'm happy enough I'll sort out the tagging and differentiating on my end

The other query was around adding offshore rocks to hierarchical boundary
relations (Townland, CP, ED, Barony, County, Province, Ireland, etc...) and
giving them admin-boundary tags. If I tag a rock as Boggedy advised above,
I will not be adding them to any relations of giving them their own
boundary tags. However, again take the case of Rathlin O'Beirne island
which is an outlying townland. Which relations should this be included in?
I guess CP (done), ED, Barony, County and Province boundaries. The Ireland
country boundary already covers it as it extends well out to the Atlantic.
The Ireland EEZ boundary I mentioned in my first mail is the Euro Ecomonmic
Zone so I don't think this applies


Cheers,

C


On 10 December 2014 at 20:26, Dave Corley <davecorley at gmail.com> wrote:
>
> Once you go off the coast a lot of the rules go out the window, so to
> speak.
>
> I know Cormac had a lot of trouble off the coast of Galway but got it
> worked out in the end. He tried explaining it to me as I wanted to do a
> video on coastline stuff but to be honest I was lost.
>
> If he's on this list he might offer advice.
>
> Dave
>  On 10 Dec 2014 16:02, "Rory McCann" <rory at technomancy.org> wrote:
>
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > Hi Conor,
> >
> > On 07/12/14 10:40, Conor Jones wrote:
> > > + County Donegal: http://www.openstreetmap.org/relation/283732 +
> > > County Donegal: http://www.openstreetmap.org/relation/4085165
> > > (seems to be 2 for each county?)
> >
> > Those 2 relations have different admin_levels. admin_level=6 is the
> > "traditional"/"common" understanding of "county". i.e. there are 32 in
> > the island of Ireland. admin_level=7 is for the things like "Dublin
> > City Council"/"Fingal County Council", where as the admin_level=6
> > would be "Co. Dublin".
> >
> > *But* in some places, there's no difference. So initially there was
> > only the admin_level=6. But I think Boggedy started duplicating them
> > to admin_level=7's. Which makes sense, if you think of the
> > admin_level=7's as the county council areas.
> >
> > NB: county councils are changing soon, so this might change, I dunno.
> > You can see admin_level's on this map: http://layers.openstreetmap.fr/
> >
> > > Should a sea-rock tagged as coastline be included in all the
> > > above?
> >
> > If it's part of the "coastline" of Ireland, I'd say yes.
> >
> > > Then there's the newer boundaries currently being worked on...
> > > townlands and parishes (and eventually baronies and ED's) What is
> > > the consensus here? Should a sea-rock be included in the townland
> > > and then the parish it would appear to be sitting of from? Some
> > > larger rocks are actually marked with ARP data on the TCD sheets...
> > > not necessarily as a townland but certainly recognised all the
> > > same
> >
> > Small islands off the coast are not usually included in townlands,
> > they are "townland-less". They often are in civil parishes and
> > counties. Hence I'd presume rocks would be similar to townlands in
> > this sense...
> >
> > Rory
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