1 : 10560 This map, showing the area around Cobham in Kent, is drawn on rectangular sheet lines, enclosed by a black border. Fields are coloured brown where cultivated, and green or blank if untilled. Stonework buildings and structures are drawn in red ink at major settlements. Pencil rays intersecting across the map, discernable beneath the inked detail, are evidence of angular measurements taken by the surveyor between fixed triangulation points. Altitudes on sites of eminence ('spot heights') have been measured and noted in red-ink figures.