1722-1804. Född i Orlunda, död i Fliseryd.
Svensk sjöofficer. Blev löjtnant vid amiralitetet 1750 men gick strax därefter i utländsk örlogstjänst. 1755 återvände han till den svenska flottan som kapten, 1766 blev han kommandörkapten och 1772 konteramiral. Adlad 1756. Var från 1758 knuten till det svenska kustmätningsarbetet. 1772-97 direktör för sjökartverket. Ett resultat av hans verksamhet var den så kallade 'Nordenankars atlas' som utkom 1782-97. Han författade den första svenska läroboken i navigation (1756). Medlem av Vetenskapsakademien i Stockholm.
In 1773, Rear Admiral Johan Nordenankar was appointed director of maps, directly under the royal court. The maps were engraved by Fredric Akrel and Eric Åkerland.
Bland arbeten.
Nordenankars atlas.
Lönborg, s. 183ff. - Sv. män och kv. Sveriges sjökartor – A. Hedin.
1796-1858.
Norsk officer 1813, 1823 förstelöjtnant vid 'Trondheims infanteribrigad' och 1825 kapten. År 1853 överstelöjtnant vid 'Kristiansands brigad'.
Ovenstad.
1721 - ca 1862.
The Amsterdam publishing firm of Covens and Mortier (1721 - c. 1862) was the successor to the extensive publishing empire built by Frenchman Pierre Mortier (1661 - 1711). Upon Mortier's death in 1711 his firm was taken over by his son, Cornelius Mortier (1699 - 1783). Cornelius married the sister of Johannes Covens (1697 - 1774) in 1821 and, partnering with his brother in law, established the Covens and Mortier firm. Under the Covens and Mortier imprint, Cornelius and Pierre republished the works of the great 17th and early 18th century Dutch and French cartographers De L'Isle, Allard, Jansson, De Wit, and Ottens among others. They quickly became one of the largest and most prolific Dutch publishing concerns of the 18th century. The firm and its successors published thousands of maps over a 120 year period from 1721 to the mid-1800s. During their long lifespan the Covens and Mortier firm published as Covens and Mortier (1721-1778), J. Covens and Son (1778 - 94) and Mortier, Covens and Son (1794 - c. 1862)
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Amiral Häggs flaggkarta. - Stockholm 1888.
Jungfrulin, Polygala vulgare - Lindman, C. A. M, Bilder ur Nordens Flora 1917-26.
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.
