Map Land Planisphere Showing Longitude. Planisphère terrestre ou sont marquées les longitudes

About this Item

Title
Land Planisphere Showing Longitude.
Other Title
Planisphère terrestre ou sont marquées les longitudes
Summary
This 1696 polar projection world map by Jacques Cassini (1677--1756) is the replica and only surviving representation of the large, 7.80-meter diameter planisphere by his father, Jean-Dominique Cassini (1625--1712). The first director of the Paris Observatory, the elder Cassini had designed the planisphere on the floor of one of the observatory's towers, using astronomical observations performed by correspondents of the Academy of Sciences. The map shows 43 places, from Quebec to Santiago, from Goa to Beijing, each marked with a star, with latitudes accurately measured using a method that relied upon observation of the moons of Jupiter. The longitudinal measurements on the map are less accurate, as the determination of longitude remained problematic until the installation on ships, in the second half of the 18th century, of marine chronometers. Their significance was that they could precisely measure the time at a known meridian when out of sight of land, which then could be used to determine longitude based on the rotation of the Earth. The map also displays uncertainties regarding the northern borders of Asia and America, which persisted until the discovery of the Bering Strait in 1728. The map is from the collection of the geographer Jean-Baptiste Bourguignon d'Anville (1697--1782). It was given to King Louis XVI in 1782 and deposited in the National Library of France in 1924.
Contributor Names
Cassini, Jacques, 1677-1756 Engraver.
Cassini, Jean-Dominique, 1625-1712 Cartographer.
Created / Published
Paris : Jean-Baptiste Nolin, 1696.
Subject Headings
-  1676 to 1696
-  World maps
Notes
-  Title devised, in English, by Library staff.
-  Original resource extent: 55 x 55 centimeters.
-  Original resource at: National Library of France.
-  Content in French.
-  Description based on data extracted from World Digital Library, which may be extracted from partner institutions.
Medium
1 online resource.
Digital Id
https://hdl.loc.gov/loc.wdl/wdl.3447
Library of Congress Control Number
2021668421
Online Format
compressed data
image
LCCN Permalink
https://lccn.loc.gov/2021668421
Additional Metadata Formats
MARCXML Record
MODS Record
Dublin Core Record
IIIF Presentation Manifest
Manifest (JSON/LD)

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Credit Line: [Original Source citation], World Digital Library

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Cite This Item

Citations are generated automatically from bibliographic data as a convenience, and may not be complete or accurate.

Chicago citation style:

Cassini, Jacques, Engraver, and Jean-Dominique Cassini. Land Planisphere Showing Longitude. Paris: Jean-Baptiste Nolin, 1696. Map. https://www.loc.gov/item/2021668421/.

APA citation style:

Cassini, J. & Cassini, J. (1696) Land Planisphere Showing Longitude. Paris: Jean-Baptiste Nolin. [Map] Retrieved from the Library of Congress, https://www.loc.gov/item/2021668421/.

MLA citation style:

Cassini, Jacques, Engraver, and Jean-Dominique Cassini. Land Planisphere Showing Longitude. Paris: Jean-Baptiste Nolin, 1696. Map. Retrieved from the Library of Congress, <www.loc.gov/item/2021668421/>.

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