Dating ordnance survey maps
Grid square TF from the Ordnance Survey National Grid, shown at a scale of 0,000.
Life in Elizabethan England Shows a basic map of Ireland with the territories owned by the Gaelic chiefs circa 1500.
It is one of the world's largest producers of maps.
Since 1 April 2015 it has operated as Ordnance Survey Ltd, a government-owned company, 100% in public ownership.
Digital images of 6, 25 and 50-inch OS maps for the whole of the UK from 1842 to 1952 are available online from the National Library of Scotland (uk/).
On that website, you’ll find map-based finding aids to help you find the relevant sheet numbers for the area in which you’re are interested.
Search by place name and map scale, and it will list all the published sheets that cover that place, with an index diagram to show sheet coverage.