Cartographer Gaudersleben.
Bland arbeten.
Thuringia 24 sh. 1625, used Blaeu 1634.
Tooley.
Frisius, Gemma. [Reinerszoon, Jemme.]
9 december 1508 - 25 maj 1555.
Gemma Frisius was a physician, mathematician, cartographer, philosopher, and instrument maker. He created important globes, improved the mathematical instruments of his day and applied mathematics in new ways to surveying and navigation.
Frisius was born in Dokkum, Friesland (present-day Netherlands) of poor parents, who died when he was young. He moved to Groningen and studied at the University in Leuven beginning in 1525. He received the degree of MD in 1536 and remained on the faculty of medicine in Leuven for the rest of his life. His oldest son, Cornelius Gemma, edited a posthumous volume of his work and continued to work with Ptolemaic astrological models.
While still a student, Frisius set up a workshop to produce globes and mathematical instruments. He became noted for the quality and accuracy of his instruments, which were praised by Tycho Brahe, among others. In 1533, he described for the first time the method of triangulation still used today in surveying. Twenty years later, he was the first...
Bland arbeten.
(Cosmographia (1529) von Petrus Apianus, annotated by Gemma Frisius)
De principiis astronomiae et cosmographiae (1530)
De usu globi (1530)
Libellus de locorum describendorum ratione (1533)
Arithmeticae practicae methodus facilis (1540)
De annuli astronomici usu (1540)
De radio astronomico et geometrico (1545)
De astrolabio catholico (1556)
fl. 1665-79.
Roggeveen was a land surveyor and mathematician by profession, working in Middelburg where the Dutch East and West India Companies maintained collections of hydrographic manuscripts and charts, including Spanish portulans of the West Indies. No doubt through contacts there Roggeveen became interested in navigation and he compiled a pilot book of largescale charts of the West Indies and parts of the American coasts, with a second volume of the coasts of West Africa. These were the first such charts printed in Holland.
Stockholm - Mentzer ca 1860.
Pumpa - Olof Rudbeck.
