Maps drawn with Viking tradition on sunstones using a sort of gnomic projection (1. draft).

Skalholt map, original dated. 1570, by Sigurdur Stefansson, Iceland. The original is lost and the present map is made by bishop Thordur Thorlaksson in 1670. The Royal library. Copenhagen.

 

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Viking geometry for Sunstone, Bearing-dial and Trelleborg

Simulation of the geometry used with a canadian find