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Glasllyn

Glasllyn

Surveyor: Giles, John C

Medium: Pen and ink on paper

Date: 1833

Shelfmark: OSD 335 G

Item number: 4

Length: 47

Width: 18

Genre: Map

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

This drawing is formally titled. The scale is recorded and the area of land surveyed noted in square miles. A triangulation diagram appears on the reverse of the drawing. Trigonometrical points are marked by a dot within a triangle. From these points, the surveyor took angular measurements to plot prominent features of the landscape. Lack of shading to indicate relief suggests that this is an intermediate drawing rather than the finished version. Faint pencil lines form a border around the plan. The top-right corner of the border is marked 'Sheet Edge' to identify the intended borders of the finished drawing.

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