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The Cassini projection (also sometimes known as the Cassini–Soldner projection or Soldner projection [1]) is a map projection first described in an approximate form by César-François Cassini de Thury in 1745. Its precise formulas were found through later analysis by Johann Georg von Soldner around 1810. [2]
It was compiled by the Cassini family, mainly César-François Cassini (Cassini III) and his son Jean-Dominique Cassini (Cassini IV) in the 1700s. It was on a scale of one line to 100 toises, i.e. 1/86,400. The map was, for the time, a real innovation and a decisive technical advance. It is the first map to be based on a geodesic triangulation ...
Map of the French coast, corrected by the Academy of Sciences in 1682. In the year 1634, France ruled by Louis XIII and Cardinal Richelieu, decided that the Ferro Meridian through the westernmost of the Canary Islands should be used as the reference on maps, since El Hierro (Ferro) was the most western position of the Ptolemy's world map. [3]
Giovanni Domenico Cassini was also the first of his family to begin work on the project of creating a topographic map of France. In addition, Cassini also created the first scientific map of the moon. [6] The Cassini space probe, launched in 1997, was named after him and became the fourth to visit Saturn and the first to orbit it.
In 1744, he began the construction of a great topographical map of France, [5] 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.
Hand-drawn map of one side of the Valley of Vesdre by French geographers (led by the Cassini family) from 1745 to 1748. In France, the first general maps of the territory using a measuring apparatus were made by the Cassini family during the 18th century on a scale of 1:86,400 (one centimeter on the chart corresponds to approximately 864 meters on the ground).
The Border 2 Fire was discovered around 2:30 p.m. PT in the Otay Mountain Wilderness Area about 30 miles southeast of the city and just north of the U.S.-Mexico border.
Portion of 1941 military map showing intersection of Palestine (blue lines) and Levant (black lines) grids near Majdal Shams. During World War II, a Military Palestine Grid was used that was similar to the Palestine Grid but used the transverse Mercator projection. [2] The difference between the two projections was only a few metres. [2]