Good stuff Brian.

Just looking at Cork Airport, it appears that when overpass looks for Civil
parishes inside area["name"="Diocese of Cloyne"] it includes Cork Airport
civil parish for some reason. This may be a limitation of how overpass or
underlying technologies calculate geospatial queries - possibly based on
civil parish centroids, approximation of diocese area by concave hulls etc.
rather than precise polygon boundary definitions.

I won't investigate further but I guess key point is it is always worth
checking overpass query results visually for accuracy too.

Cheerio
 - John



On Tue, 28 Apr 2020 at 14:46, Brian Hollinshead <[email protected]>
wrote:

> John and Donal, This made it so easy. In under eleven minutes I loaded all
> 87 civil parishes into Josm and Excluding the four in Ardfert, there was
> one duplicate name, selected the 83 I wanted, the downloaded all the
> members, then using John's select the dissolved members I created a new
> Diocese of Cork relation, changed the three enclaves from outer to inner ,
> uploaded the file and sat back. So much easier than any other method.
> many thanks for your interest.
>
> On Tue, 28 Apr 2020 at 12:30, John Kennedy <[email protected]> wrote:
>
> > Hi Brian.
> > Does this work?
> >
> > https://overpass-turbo.eu/s/TnN
> >
> > I attempt to gather all CPs in Cork.
> > Then all CPs in the mapped dioceses.
> > Then take the difference.
> >
> > But I just query by area name - this could be tightened further.
> >
> > Rgds/
> >  - John
> >
> >
> >
> >
> > On Tue, 28 Apr 2020 at 09:20, Brian Hollinshead <[email protected]>
> > wrote:
> >
> > > Hi Donal,
> > > Thanks for having a go at that overpass query. Your offer showed the
> > > Diocese of Ardfert which has perhaps six Cork civil parishes. I had not
> > > included it in my enquiry for fear of complicating it further.
> > >
> > > If you run overpass, include all County Cork on screen and use wizard:
> > > boundary=historic_diocese, the resultant white space is the Diocese of
> > Cork
> > > (1837)  from which i wish to load all the civil parishes into JOSM for
> > > further progress.
> > >
> > > For anyone new to this conversation that is : all the civil parishes in
> > > County cork not already mapped in OSM as parts or all of the Dioceses
> of
> > > Ardfert and Aghadoe, Cloyne or Ross. (as boundary=historic_diocese)
> > >
> > > Further suggestions from anyone more familiar with overpass than I am
> > will
> > > be most welcome.
> > >
> > > Thanks
> > >
> > > On Tue, 28 Apr 2020 at 00:17, Donal Hunt <[email protected]>
> > > wrote:
> > >
> > > > Hi Brian,
> > > >
> > > > I tried to take a stab at this but overpass got the better of me!!
> > > >
> > > > Here is what I've got so far: https://overpass-turbo.eu/s/Tn4
> > > >
> > > > This will give you an area excluding the two diocese relations you
> > > > mentioned. I think you either need to do a map_to_area or a Recurse
> > > up/down
> > > > relations function after that but I can't wrap my head around that
> part
> > > and
> > > > there are few examples that explain it well enough...
> > > >
> > > > Also - in hindsight, my query result only returns other diocesan
> areas
> > > that
> > > > are not Ross / Cloyne. There are obviously parts of Cork that aren't
> > > > contained within a diocesan area right now.
> > > >
> > > > Hopefully one of the overpass gurus here will put us out of our
> > misery!!
> > > =)
> > > >
> > > > Donal
> > > >
> > > > On Sat, Apr 25, 2020 at 4:38 PM Brian Hollinshead <
> > [email protected]
> > > >
> > > > wrote:
> > > >
> > > > > Overpass query: County Cork comprises the Dioceses of Cloyne, Cork
> > and
> > > > > Ross. I have added Cloyne and Ross as boundary=historic_diocese to
> > OSM.
> > > > > Please can I use overpass to load the remaining civil parishes into
> > > JOSM.
> > > > > Something  like  boundary=civil_parish in "County Cork" BUT NOT
> > > > > (boundary=civil_parish in "Diocese of Cloyne") OR NOT
> > > > > (boundary=civil_parish in "Diocese of Ross). I seem to remember
> that
> > > > > boundary!=xxx omits what follows but am unsure.
> > > > > Thanks
> > > > > _______________________________________________
> > > > > Talk-ie mailing list
> > > > > [email protected]
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> > > > >
> > > >
> > > >
> > > > --
> > > > Donal Hunt
> > > > OpenStreetMap Ireland
> > > > [email protected] | +353 87 8175123
> > > > _______________________________________________
> > > > Talk-ie mailing list
> > > > [email protected]
> > > > https://lists.openstreetmap.org/listinfo/talk-ie
> > > >
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> > >
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