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.
ca 1646-1708.
About 1675, shortly before the van Keulen publishing business was set up in Amsterdam, Robijn practised there as a map 'illuminator' and chart seller. After a short association with Johannes van Keulen he acquired publishing rights covering the Zee-Spiegel and Zee Atlas from the widow of Pieter Goos and used the plates to produce his own pilot book and sea atlas. Apart from a small number of plates prepared to his own order, most of Robijn's work cannot be said to be original: he issued Goos's charts and those of Roggeveen with a variety of texts by J. and C. Jacobsz (Lootsman), Arent Roggeveen and even John Seller with the result that analysis of the various issues cannot easily be simplified. Robijn's stock was eventually taken over by Johannes Loots. The brief details given below should be read in conjunction with our notes on Pieter Goos and Arent Roggeveen.
Bland arbeten.
Hoogheymraadschap van Rhynland. (Leiden?, 1685-1688).
This large –scale map, compiled by Janz Douw and Steven van Brouchhuysen and engraved by Cornelis Danckerts, originally issued in 1647, was intended to be assembled into a wall-map in four series of three leaves. Between 1685 and 1688 the plates were brought up to date and the cartouche re-embellished by Romeyn de Hooghe and the map re-issued.
Sotheby's
1732-1812.
Före adlandet Klint, sjöofficer, ämbetsman, f. 6 okt. 1732 på Kölby, Ljungby skn, Kalmar län, d. 10 nov. 1812 på Visborgs kungsgård på Gotland. Föräldrar: häradshövdingen och lagmannen Esaias K. och Brita Maria Bubb. - K. blev 1750 kofferdibåtsman och 1755 löjtnant vid amiralitetet samt 1757 militärguvernör och informationsofficer vid den i Karlskrona året förut inrättade kadettskolan, som han kom att ägna många år av sitt bästa arbete. K. företog 1764-66 en Ostindienresa på skeppet Finland samt blev 1767 befordrad till kaptenlöjtnant och 1776 till major vid örlogsflottan. Vid sidan av sin lärartjänst provseglade K. de av Chapman nykonstruerade örlogsfartygen, samt ritade och korrigerade under konteramiral Johan Nordenanckars ledning bl.a. sjökort över Östersjön och Finska viken. Vid utbrottet av Gustav III:s ryska krig 1788 erhöll K. befälet på flaggskeppet Gustaf III med storamiralen hertig Karl ombord, en förtroendepost han behöll under hela kriget. Han deltog med utmärkelse i sjöslagen vid Hogland 1788, e...
Svenska män och kvinnor, band IV. Bonniers 1948. Sveriges sjökartor – A. Hedin.
Karta öfver Stockholm. - 1904.
'Carte Reduite des Parties Septentrionales du Globe.' - Bellin 1758.
Cassini de Thury, César-François
Biografiska uppgifter:17 June 1714 – 4 September 1784
César-François Cassini de Thury (17 June 1714 – 4 September 1784), also called Cassini III or Cassini de Thury, was a French astronomer and cartographer.
Cassini de Thury was born in Thury-sous-Clermont (Oise), the second son of Jacques Cassini and Suzanne Françoise Charpentier de Charmois. He was a grandson of Giovanni Domenico Cassini, and would become the father of Jean-Dominique Cassini, Comte de Cassini.
In 1735, he became a member of the French Academy of Sciences as a supernumerary adjunct astronomer, in 1741 as an adjunct astronomer, and in 1745 as a full member astronomer.
In January, 1751 he was elected a Fellow of the Royal Society.
He succeeded to his father’s official position in 1756 and continued the hereditary surveying operations. In 1744, he began the construction of a great topographical map of France, one of the landmarks in the history of cartography. Completed by his son Jean-Dominique, Cassini IV and published by the Académie des Sciences from 1744 to 1793, its 180 plates are known as the Cassini map(fr).
The post of director of the Paris observatory was created for his benefit in 1771 when the establishment ceased to be a dependency of the French Academy of Sciences.
His chief works are: La méridienne de l’Observatoire Royal de Paris (1744), a correction of the Paris meridian; Description géométrique de la terre (1775); and Description géométrique de la France (1784), which was completed by his son ('Cassini IV').
César-François Cassini de Thury died of smallpox in Paris on 4 September 1784,
The Cassini projection is a map projection described by César-François Cassini de Thury in 1745. It is the transverse aspect of theequirectangular projection, in that the globe is first rotated so the central meridian becomes the 'equator', and then the normal equirectangular projection is applied.
In practice, the projection has always been applied to models of the earth as an ellipsoid, which greatly complicates the mathematical development but is suitable for surveying. Nevertheless the use of the Cassini projection has largely been superseded by the Transverse Mercator projection, at least with central mapping agencies.
Areas along the central meridian, and at right angles to it, are not distorted. Elsewhere, the distortion is largely in a north-south direction, and varies by the square of the distance from the central meridian. As such, the greater the longitudinal extent of the area, the worse the distortion becomes.
Due to this, the Cassini projection works best on long, narrow areas, and worst on wide areas.
