Charles Hutton's Contour Line Map of Schiehallion Recreated by

Schiehallion – Contour lines and Maskelyne's observatory

Hutton's sketch of the mountain Schiehallion and the surrounding land

The Great Lines Karen Rann investigates the invention of contour

Maps Mania: Styling Contour Lines

The Great Lines Karen Rann investigates the invention of contour

Schiehallion – Contour lines and Maskelyne's observatory

A song of Schiehallion

Map Mark Making The Great Lines

Schiehallion – Contour lines and Maskelyne's observatory

A song of Schiehallion

Great Lines (triangles, skeletons & spots)

Schiehallion – Contour lines and Maskelyne's observatory