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Redruth, Cornwall

Redruth, Cornwall

Draughtsman: Dawson, Robert

Medium: Pen and ink on paper

Date: 1809

Shelfmark: OSD 4/5

Item number: 1

Length: 28

Width: 26

Genre: Map

Map scale ratio: 2' : 1 Mile ( 1: 31680)

The contouring technique used by Robert Dawson on this map precedes the introduction of obligatory contouring on Ordnance Survey maps in 1839-40. Short watercolour lines ('hachures'), drawn with a brush, follow the direction of slope and are paced to indicate the steepness of relief. Colour washes are steadily built up, giving realism to the depiction of hills, mountains and, in particular, the thickly wooded valleys descending from the moors and downs towards the sea. Tin and copper mining is evident around Redruth and Camborne. A triangulation diagram is inscribed on the reverse of the manuscript but is now obscured by backing material.

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