Ordnance Survey, the 232-year-old national mapping agency, has released its first ever official mapping app on Apple iOS devices, taking the iconic paper maps into the digital age. There are plenty of ...

THE adoption of the Newlyn datum for Ordnance levels in place of the old Liverpool datum involved a change in levels on the Ordnance maps throughout Great Britain. The difference, however, is not ...

IN a paper prepared for the British Association meeting at Dundee, but not delivered, Brigadier A. B. Clough outlined the recommendations of the report of the Committee appointed in May 1935 to ...