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Picryl description: Public domain image of fire insurance plan / map, 19th century, free to use, no copyright restrictions.
Historical map series for the area of al-Bira, Baysan (1870s)
Nouveau plan routier de la ville et faubourgs de Paris divisé en douze mairies, année 1819 - Stanford Libraries
1749 Larcher D Aubencourt Vrijthofopgravingen 03
Sanborn Fire Insurance Map from Schenectady, Schenectady County, New York
map from "Paterson's Guide Book to England and Wales. With maps and plans ... 1886, etc"
1749 Larcher D Aubencourt Vrijthofopgravingen 31
PPN611700395 Entwurf zur Verbesserung des Hafens von Hamburg und zur Benutzung des Grasbrooks gehörig zum Bericht vom 10. Octbr. 1845 (1856)
Image taken from page 1149 of 'Old and New London, etc' (11190453896)
Fuerte de Sn. Pedro y su rada en la Ysla de Martinica.
Summary
Shows region of Saint-Pierre including the fort.
Pen-and-ink.
Mounted on cloth backing.
LC Luso-Hispanic World, 516
Available also through the Library of Congress Web site as a raster image.
Maggs number annotated in pencil in lower right margin: 218.
Vault
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.