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La Floride / Historic map, Library of Congress
Summary
Relief shown pictorially.
Shows the coastline from Secotan in Virginia to Planuco in Mexico; the interior is shown to 40 degrees of latitude north and includes lakes and rivers in the region.
Prime meridian: [Ferro].
Appears to be no. [3] detached from: L'Amériqve en plvsievrs cartes novvelles, et exactes, &c., ... Paris, [1657?] -P.L. Phillips, A list of geographical atlases in the Library of Congress, no. 1153, p. 576-577.
Available also through the Library of Congress Web site as a raster image.
Copy annotated in pencil on upper left corner: In L'Amérique en plvsievrs cartes. Paris. 1657. No. 3
Copy imperfect: Stained and worn along edges of map
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.
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