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Related
Tioughnioga River near Lisle, N.Y.
Tioughnioga River near Lisle, N.Y
A group of people riding on top of a boat. China giulin li river.
The Chu Kiang River at Canton. China
Bluffs of the Tennessee River, Chattanooga, Tenn.
Tadousac Landing and mouth of the Saguenay River
Transiting the Thames River
Bluffs of the Tennessee River, Chattanooga, Tenn.
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Descripción del Río Tigris desde Canton hasta la Ysla de Lankeet.
Summary
Relief shown pictorially and by shading and form lines. Depths shown by soundings.
Watermarks: J. Honig & Zoonen; and, Strasburg fleur-de-lis over the characters JH & Z. Watermark dated from 1737-87.
Pen-and-ink.
Mounted on cloth backing.
LC Luso-Hispanic World, 244
Available also through the Library of Congress Web site as a raster image.
Includes text and 12 panoramic views.
Maggs number annotated in pencil in lower right margin: 268.
Vault
Ancient Maps from the Library of Congress. 13th -18th Century Maps.
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.