Diagram showing the principal triangulation for the Ordnance trigonometrical survey of Great Britain and Ireland.
Diagram showing the principal triangulation for the Ordnance trigonometrical survey of Great Britain and Ireland. (to accompany) (V. 2: plates) Ordnance Trigonometrical Survey. Account of Principal Triangulation. Plates. (with) (V.1: text) Ordnance trigonometrical survey of Great Britain and Ireland : Account of the observations and calculations of the principal triangulation ... London: Printed by George Edward Eyre, and William Spottiswoode. Printers to the Queens most excellent Majesty. 1858.
David RumseyClarke, Alexander Ross, 1828-1914
1858
1858
Ordnance Survey Map Office
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