-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all,
A while ago I mentioned a possible problem with the Logainm data import, where 2+ townlands were getting the same logainm reference[1]. Upon closer investigation, I don't think this is a bug with the import process, but a question of "Is a townland is one townland or many townlands?". Consider Graiguealug townland in Carlow. It's in OSM as 3 different townlands: OSM ids https://www.openstreetmap.org/relation/2196774 https://www.openstreetmap.org/relation/2274862 https://www.openstreetmap.org/relation/2274863 all touching each other. Each is in a different civil parish[2]. However Logainm only has one entry http://www.logainm.ie/en/3531 which is in 3 different civil parishes. Logainm allows one townland to be in more than one CP. If you look at the GSGS map, only one townland is shown on the map, and the total area (~400 acres) is similar to the total off the 3 townlands in OSM. It looks like one townlands was split into 3 townlands so that each townland would be in one and only one CP. However I don't think this is the right approach. I think the OSM philosophy of "One Feature, One OSM Element"[3] should apply, and that those 3 townlands should be merged into 1. The CP boundaries should physically stay where they are, but they will not line up with a townland boundary. I seen other examples of townlands crossing CP boundaries and have mapped them as one townland, with a CP border going through the middle. I'm tempted to merge townlands like this into one townland. What do people think? Rory [1] https://lists.openstreetmap.org/pipermail/talk-ie/2016-March/001499.html [2] Townlands.ie: https://www.townlands.ie/carlow/forth/templepeter/templepeter/graiguealug/ https://www.townlands.ie/carlow/forth/tullowmagimma/templepeter/graiguealug/ https://www.townlands.ie/carlow/forth/nurney/templepeter/graiguealug/ [3] https://wiki.openstreetmap.org/wiki/One_feature,_one_OSM_element -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQEcBAEBAgAGBQJXSri4AAoJEOrWdmeZivv2Lc8H/AoZcBrdbT3u5y2vvKBnKh8J BKP48p0sVAyMyDAWl3nQ88kqwuHcNcYYBt+aWwfDAeOyBs63OJQ1dlcw1+9EW3iL wxkauYKAvVNEd1m7sHBFWwIdxhmRUfinwrHyNhoIFL84/bExPAs4KCe1epFYwqNd hSFP5lnRuaikct5eEkP9uTr0tGDRkYLzwGOwcj30xZSz89dB786bc/YR834kgigi kYtjL6O+uEZ05Xb1M2kSyzR+LdmEW3tFYEu1RHjxlMKIgOedUAF0+RdEF0qOOmPe optVIDIyxFuTk0BTsqITb05uyPHss58zamz0ldnZBh0AqAg8JTQjxl9/IDxhFqw= =z0F7 -----END PGP SIGNATURE----- _______________________________________________ Talk-ie mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk-ie
