Tag Archives: Ordnance Survey Ireland


Ordnance Survey Ireland piece on Waterways Ireland’s use of OSI data.

Ordnance Survey historic maps

I am delighted to say that Ordnance Survey Ireland has kindly given me permission to use extracts from their historic maps to illustrate articles on this site as well as in any talks I give. The complete maps are free to view on the OSI website; choose 6″ for around 1840 (different sheets were surveyed and published in different years) and 25″ for around 1900. You can zoom in to see details and even overlay a modern map on an older one. The OSI maps are invaluable to anyone interested in history or heritage. I am very grateful for permission to use extracts on this site.