L'Asie, : Selon les nouvelles observations de Mess.rs de l'Academie des Sciences, etc. /
Relief shown pictorially.
Insets maps: Kamchadka to Korea to Indo-China; Beijing, China to Yellow Sea.
Available also through the Library of Congress Web site as a raster image.
Tartary, a vast country in the northern parts of Asia, bounded by Siberia on the north and west: this is called Great Tartary. The Tartars who lie south of Muscovy and Siberia, are those of Astracan, Circassia, and Dagistan, situated north-west of the Caspian-sea; the Calmuc Tartars, who lie between Siberia and the Caspian-sea; the Usbec Tartars and Moguls, who lie north of Persia and India; and lastly, those of Tibet, who lie north-west of China.
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.