A Coloured Chart, on vellum, of the South-West Coast of Ireland, from the Shannon to Cork
Cartographer: [Norman, Robert]
Medium: Ink and pigments on vellum
This is a map of the south-west coast of Ireland, from the Shannon to Cork. It is thought to date from the reign of Elizabeth I and may be the work of the cartographer Robert Norman. The mainland is outlined in green and islands and rocky outcrops are coloured red and blue. Settlements are represented pictorially by images of houses and churches, woodland is also indicated. As it is a coastal survey it is similar in presentation to a Portolan chart, a sea chart used by mariners, in that place names radiate out from the coast line. The lines radiating from fixed points are calledrhumb-lines. These are lines of constant bearing that radiate from compass roses and allow the sailor to plot a course from harbour to harbour using dividers and straight edge.