Charles Hutton's Contour Line Map of Schiehallion Recreated by

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

Schiehallion – Contour lines and Maskelyne's observatory

The Great Lines Karen Rann investigates the invention of contour

Map Mark Making The Great Lines

Charles Hutton's Contour Line Map of Schiehallion Recreated by

The Highland North - Heart 200

A song of Schiehallion

Great Lines (triangles, skeletons & spots)

HGSS - The attraction of the pyramids: virtual realization of

multivariable calculus - Approximation used in Hutton's

Schiehallion – Contour lines and Maskelyne's observatory

Schiehallion – Contour lines and Maskelyne's observatory

A song of Schiehallion

The Great Lines Karen Rann investigates the invention of contour