1724-1804.
Dansk ämbetsman. Född och död i Köpenhamn. Började 1738 studera och tog en teologisk examen 1743. Efter flera års studieresor i Tyskland och Holland blev han 1754 anställd som matematiker i marinens tjänst. 1760 fick han titeln professor, och 1763 blev han navigationsdirektör. Medlem av olika danska lärda sällskap. Var en produktiv författare inom sitt fackområde, och utarbetade flera sjökort, speciellt över Kattegatt och danska farvatten.
Ehrencron.
VISSCHER, CLAES (eller NICOLAS ) JANZON.
1586-1652. Född och död i Amsterdam.
Holländsk kartograf. Gick i lära som kopparstickare och kartritare hos Jodocus Hondius och grundlade därefter sitt eget konstförlag. Visscher var en duktig kopparstickare, som förutom kartor även utförde landskaps- och historiska bilder. Hans firma övertogs av sonen Nicolas (1618-79) och senare sonsonen Nicolas Visscher (se denne). Deras firma gav ca. 1660 ut en 'Atlas Contracuts' och ca. 1680 en 'Atlas minor' som både kom i en rad utgåvor. Deras kartplaner användes också i stor utsträckning av andra kartutgivare, både i Holland och andra länder. Kartor av den äldre Visscher räknas som ganska sällsynta. Han uppträder vanligtvis under sitt latinska namn Nicolaus Joh. Piscator.
Claes Jansz. ging rond 1608 in het huis 'Op de Kolck inde Visscher' wonen. In het begin lag de nadruk op het versieren van de kaarten van Blaeu en Hondius. Later begon hij zijn eigen drukkerij en startte ook met de productie van kaarten. In 1611 kocht hij een huis in de gerespecteerde Kalverstraat, waar ook belangrijke concurrent...
Bland arbeten.
Atlas Contracuts.
Atlas minor.
Nederl. biogr., VII. - 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)
Stockholm - Mentzer ca 1860.
Knut Skrifvares adliga ätt - C. H. Tersmeden ca 1900.
Keere, Pieter van den [Kaerius, Petrus]
Biografiska uppgifter:1571-c. 1646.
Pieter van den Keere was one of a number of refugees who fled from religious persecution in the Low Countries between the years 1570 and 1 590. He moved to London in 1584 with his sister who married Jodocus Hondius, also a refugee there, and through Hondius he undoubtedly learned his skills as an engraver and cartographer. In the course of a long working life he engraved a large number of individual maps for prominent cartographers of the day but he also produced an Atlas of the Netherlands (1617-22) and county maps of the British Isles which have become known as Miniature Speeds, a misnomer which calls for some explanation.
In about 1599 he engraved plates for 44 maps of the English and Welsh counties, the regions of Scotland and the Irish provinces. The English maps were based on Saxton, the Scottish on Ortelius and the Irish on the famous map by Boazio. These maps were not published at once in book form but there is evidence which suggests a date of issue (in Amsterdam) between 1605 and 1610 although at least one authority believes they existed only in proof form until 1617 when Willem Blaeu issued them with a Latin edition of Camden's Britannia. At this stage two maps were added, one of the British Isles and the other of Yorkshire, the latter derived from Saxton. To confuse things further the title page of this edition is signed 'Guilielmus noster Janssonius', which is the Latinized form of Blaeu's name commonly used up to 1619.
At some time after this the plates came into the possession of Speed's publishers, George Humble, who in 1627, the year in which he published a major edition of Speed's Atlas, also issued the Keere maps as a pocket edition. For these he used the descriptive texts of the larger Speed maps and thereafter they were known as Miniature Speeds. In fact, of the 63 maps in the Atlas, 40 were from the original van den Keere plates, reworked, 16 were reduced from Speed and 7 were additional. The publication was very popular and there were further re-issues up to 1676.
