1596-1673. Född och död i Amsterdam.
Holländsk kartograf, bror till Cornelius Blaeu och son till Willem Janszoon Blaeu. Han var 1633-34 kartograf vid det holländska ostindiska kompaniet. Förutom att deltaga i familjens kartarbeten och föra dessa vidare efter faderns och broderns för tidiga död, gav han själv 1648 ut en stor världsatlas, 'Nova totius terrarum orbis tabula' i 20 blad, ett mycket omfattande utfört arbete, helt uppdaterat. Firmans kontor och lager i Gravenstraat eldhärjades svårt 1672 och skadorna blev förödande. En mängd kopparstick förlorades, däribland de norska som aldrig kunde tryckas igen. Jessen-Schardeböll nämner redan 1763 Blaeus kartor som sällsynta. Efter Joan Blaeus död gick affären över till sönerna Willem, Pieter och Joan.
Bland arbeten.
Nova totius terrarum orbis tabula.
Jessen. - Nederl. biogr., X. - Tooley.
Bland arbeten.
Encyclopédie ou dictionnaire universel raisonné des connaissances humaines.
CODDE, Capt. PIETER, of ENCHUYSEN.
Bland arbeten.
Seehaven ende stads Van Duynkercken 1631. Använd av Blaeu 1634 och Jansonnius.
Även den franska upplagan 1643/44 med titeln 'Pourtraict de la fameuse ville et havre de Duynckercke et places voisines, sables etc. facit par le Capitaine Pierre Codde d'Enschuse.
R.deT. Tooley.
Vägvisare för XI Olympiaden i Berlin - 1936
Borstnate, Potamogeton pectinatus - Lindman, C. A. M, Bilder ur Nordens Flora 1917-26.
Frisius, Gemma. [Reinerszoon, Jemme.]
Biografiska uppgifter: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 to describe how an accurate clock could be used to determine longitude. Jean-Baptiste Morin (1583–1656) did not believe that Frisius' method for calculating longitude would work, remarking, 'I do not know if the Devil will succeed in making a longitude timekeeper but it is folly for man to try.'
Frisius created or improved many instruments, including the cross-staff, the astrolabe and the astronomical rings. His students included Gerardus Mercator (who became his collaborator), Johannes Stadius, John Dee, Andreas Vesalius and Rembert Dodoens.
A lunar crater has been named after him.
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)
