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English

Jacob van Deventer was among the first to make systematic use of triangulation, a technique whose theory was described by his contemporary Gemma Frisius in his 1533 book, Libellus de locorum describendorum ratione.

Swedish

Jacob van Deventer var bland de första att systematiskt använda triangulering, en teknik vars teori beskrevs av hans samtida Gemma Frisius i boken Libellus de locorum describendorum ratione 1533.