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The empire of the Great Turke in Europe, Asia, & Africa : divided into all its beglerbeglicz or governments in which are also distinguished the states that are tributary to him
Summary
Covers the Ottoman Empire and adjacent regions of the Middle East.
Relief shown pictorially.
Prime meridian: Ferro.
Originally printed on 2 sheets (western/eastern) now conjoined.
LC copy imperfect: Fold-lined to form sheet quarters.
Includes inset of Algerian littoral of Africa, bar scales for 5 different lengths of measurement, embellished title cartouche, and embellished bar-scale cartouche.
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.
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