1512-1577.
Cartographer, publisher and printer of maps and graphic art. Born in France, Lafreri moved to Rome in 1540 where he launched a business in 1544. His great triumph came in 1572 with the publication of a catalogue including a reduced copy of Olaus Magnus's famous Carta Marina.
Sveriges sjökartor – A. Hedin.
1745-1808. Född i Rendsburg, död i Berlin.
Dansk-tysk historiker. 1762 blev han officer i artilleriet, 1773 kapten och 1785 major. 1778-79 deltog han i ett fälttåg med den preussiska armén. 1787 tog han avsked från dansk krigstjänst och gick över i preussisk. 1788 blev han direktör vid Ingeniörsakademiet i Potsdam, 1796 överste och 1800 generalmajor. 1777 utgav han 'Memoires d'artillerie' och 1785 'Almindeligt Udkast af Krigens Skueplads eller geographisk, topographisk og historisk Beskrivelse over Danmark, Norge og Sveriig.. som Inledning till Fredrik IV's KrigsHistorie'.
Bland arbeten.
Memoires d'artillerie.
Almindeligt Udkast af Krigens Skueplads eller geographisk, topographisk og historisk Beskrivelse over Danmark, Norge og Sveriig.. som Inledning till Fredrik IV's KrigsHistorie.
Ehrencron.
Född 1727 22/6 på Västervik i Varnums sn (Värml), död 1793 26/12 i Vadstena.
Lantmätare, kartograf och kopparstickare. Ingenjör. Broder till Jacob Gillberg. Student vid Uppsala universitet 1748. Volontär vid Fortifikationen 1749. Avlade lantmäteriexamen. 1754, kommissionslantmätare 1757. Postmästare i Vadstena 1785-90
Bland arbeten.
J. L. GILLBERG, Historisk, oeconomisk och geographisk beskrifning öfwer Malmö hus lähn, Lund 1765: karta över Malmöhus hövdingedöme.
DENS., Historisk, oeconomisk och geographisfc beskrifning öfver Christianstads län, Lund 1767: karta över Kristianstads hövdingedöme.
Karta över Gästrikland och Hälsingland, efter O. Insulander 1789.
Hultmark, 1944.
Stockholm - Mentzer ca 1860.
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.
