Eynsford (Kent)
This drawing, showing the area around Eynsford in Kent, is covered by a network of red rays, radiating from fixed points marking triangulation stations. These stations, usually sites of relative physical eminence, provided a framework within which to survey the topography of the land. On this plan, red lines radiate from the village church of Ash, marked by a red cross, and from an obelisk in Lullingstone Park. On the far left of the drawing, the word "flag" represents another triangulation point, from which the surveyor took angular measurements. Handwritten annotations at the bottom of the drawing refer to area measurements. There are some corrections in ink
The British Library1798
1798