Organisation
Land & Property Services – Ordnance Survey of Northern Ireland
Ordnance Survey of Northern Ireland® (OSNI®) is a National Mapping Authority and the official producer of high quality, accurate and current geographic mapping data for Northern...
Læs mere
Stefan Beacom updated the datasæt OSNI Open Data - Historical Six Inch to One Mile County Series Edition 1 (1829 - 1835) - Derry/Londonderry
