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Estats de l'empire dv Grand Seignevr des Tvrqs ou Svltan des Ottomans en Asie, en Afriqve, et en Evrope

Estats de l'empire dv Grand Seignevr des Tvrqs ou Svltan des Ottomans en Asie, en Afriqve, et en Evrope

 
 
description

Summary

Covers the Ottoman Empire and adjacent regions of the Middle East.
Relief shown pictorially.
Prime meridian: Ferro.
Hand colored to emphasize the boundaries of the constituent states and provinces.
LC copy imperfect: Vertically fold-lined at sheet center.
Includes inset of Algerian/Tunisian littoral of Africa, bar scales for French leagues/German miles, and embellished title cartouche (with 3 Turkish [?] head figurations).
Available also through the Library of Congress Web site as a raster image.

In the 17th century, maps took a huge leap forward. Mathematical and astronomical knowledge necessary to make accurate measurements had evolved. English mathematicians had perfected triangulation: navigation and surveying by right-angled triangles. Triangulation allowed navigators to set accurate courses and produced accurate land surveys. Seamen learned to correct their compasses for declination and had determined the existence of annual compass variation. Latitude determination was greatly improved with the John Davis quadrant. The measurement of distance sailed at sea was improved by another English invention, the common log. Longitudinal distance between Europe and Québec was determined by solar and lunar eclipses by the Jesuit Bressani in the 1640s and by Jean Deshayes in 1686. With accurate surveys in Europe, the grid of the modern map began to take shape.

date_range

Date

01/01/1654
place

Location

middle east
create

Source

Library of Congress
copyright

Copyright info

Public Domain

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