3D
Oswestry
This drawing is formally titled. The scale of the drawing isgiven and the area of the land noted as 145.9838 square miles., A triangulation diagram appears on the reverse of the manuscript., This enabled draughtsmen to plot the exact location of topographical features., Archaeological sites are named in gothic script., Colour washes are combined with numerical annotations to indicate the relative relief and overall height of hills.
The British Library1830