Related
Jefferson building - Map Division(?), Library of Congress
Library of Congress, Map Division quarters, north curtain, second floor
Catalogue of books, maps, and charts, belonging to the Library of the Two Houses of Congress.
Catalogue of books, maps, and charts, belonging to the Library of the Two Houses of Congress.
History of the construction of the Library of Congress, Washington, D. C
History of the construction of the Library of Congress, Washington, D. C
History of the construction of the Library of Congress, Washington, D. C
History of the construction of the Library of Congress, Washington, D. C
History of the construction of the Library of Congress, Washington, D. C
Dordracvm ; Briela. Historic map, Library of Congress
Summary
Perspective map not drawn to scale.
Oriented with north toward the upper right.
Bird's-eye-view.
Available also through the Library of Congress Web site as a raster image.
From Pierre d'Avity's Newe archontologia cosmica, engraved by Matthaeus Merian.
Indexed for points of interest.
LC copy has stamp in lower left corner (823B) Ink inscription in upper right corner (68).
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.