[OSM-talk-ie] Irish boundaries map layer updates

Rory McCann rory at technomancy.org
Wed Apr 1 14:38:34 UTC 2015


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 26/03/15 23:53, Donal Diamond wrote:
> You'll also notice a small difference in the acreage size reported
> by townlands.ie and the map layer. That is due to the map layer
> transforming to Irish Grid when calculating the area to get a
> slightly more accurate calculation. Townlands.ie has to do a lot
> more analysis so uses a different spatial reference system.

Just for the record, I've changed townlands.ie so that it uses the
same area calculation process the Donal describes, so it should give
the same numbers as the map.

- -- 
Rory
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iQEcBAEBAgAGBQJVHALqAAoJEOrWdmeZivv2WdsH/1gdY3QIhuNTVUrHAJI1QDlU
ylUmHC9Ny3zdOSB82eeZr4IWs6J6xJ3tZ1DYG2eabz/WSTYoqLu726w3Agjqdthn
C6NWqNLz0pxCItimsrD4wbHU0F8DPohfVadpNuwWlzCUVAKCR72faf5NY5qtOSUF
R9R7UlmJua8jQKOAUJKxh8i0AICa+T0HmhKnogxZjZSXsCN00cy+yw7UWOMjTHFh
h7YWTZY/07e0trKwhfqo+W5kMWz5sP9DjuPJRs61zMKUck9UOYsc3dZYWf6LM8G/
OqFer+yFZtKsRZZcx3o4fNdPstTTbfDWZdoY2WTipppZzH+PkxM5evw6zTAzfdY=
=NVBf
-----END PGP SIGNATURE-----



More information about the Talk-ie mailing list