-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all,
Thanks for the replies, it looks like there are many good reasons for things to be mapped this way. I won't change anything. I'll tweak the logainm import script to not throw an error in these case s. Rory On 29/05/16 11:39, Rory McCann wrote: > 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.ht ml > > [2] Townlands.ie: > https://www.townlands.ie/carlow/forth/templepeter/templepeter/graiguea lug/ > > https://www.townlands.ie/carlow/forth/tullowmagimma/templepeter/graiguea lug/ > https://www.townlands.ie/carlow/forth/nurney/templepeter/graiguealug/ > > [3] https://wiki.openstreetmap.org/wiki/One_feature,_one_OSM_element > > _______________________________________________ Talk-ie mailing > list [email protected] > https://lists.openstreetmap.org/listinfo/talk-ie > -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQEcBAEBAgAGBQJXYlNZAAoJEOrWdmeZivv2oDsIAJPm2FBgTNtOgmFwQHJlE1YY RjAbmdjhq9ljbSiSCZfCi2bRto0uROFc5us/LV5GoCdSFd4ZtN3zR36ngB5g8oA7 8WaPtDkBAiWCf8I8y6GQqC6Sx21R+jOPXaskN5a0Xg5Od1LIHB1Dy+kXBd+aHtJr 4CHx2fKgrNhKQ9J1LAI8/Gzl2Rw9+cYAOkpsMdgo7/Hi36HY2l7OVybn58B5AoIR GvghUVzHrAXKsk/fj2swN791TYPP7SgmDmAEeIz3cIVR3OUueioX/i8LvdV+AfSv SdkjBIgU71DmMIZeB7+IQRCBjjUQTipHPx+d4Sv4anJv9jp1wroVikV4FkfRj+c= =Ulhs -----END PGP SIGNATURE----- _______________________________________________ Talk-ie mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk-ie
