Diagram shewing the principal triangulation for the Ordnance Survey of Great Britain and Ireland

Diagram shewing the principal triangulation for the Ordnance Survey of Great Britain and Ireland [cartographic material] , Scale 1:1584000 - S.l. s.n. n.d - 1 map cloth backed 83 x 58 cm.

Map is very brittle and there are some areas of loss to the edges.


Great Britain--1707-