Similar
Carta particolare che comincia con il capo S. Andrea è finiscie con il capo Matas d'America
Fotothek df tg 0002923 Architektur ^ Festungsbau ^ Flanke ^ Ravelin ^ Kontreskarpe ^ Turm
Admiralty Chart No 1312 Singapore Strait to Borneo (southern sheet), Published 1968
AMH-6087-NA Map of Timor and environs, part A
Beleg en inname van Den Bosch door Frederik Hendrik, 1629, (blad linksboven)
Leonardo da Vinci - Codex Atlanticus - 000V-47
AMH-5221-NA Chart showing soundings in the river at Batavia
Copy of a survey return'd by Mr. Sam Lewis, surveyor of Botetourt Coun[t]y. Surveyed for George Washington 2950 acres of land (by virtue of a warrant for 5,000 acres granted by His Excellency the Governor to said Washington agreeable to His Majesty proclamatiom issued in the year 1763) lying in the county of Botetourt on the n.e. side of the Great Kanhaway about a mile and half above the mouth of Cole River, joining the upper end of the Poketillico survey ... Novemr. 6th, 1774.
AMH-5259-NA Chart showing soundings in the river at Batavia
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Summary
Depths shown by soundings.
Watermark: PVL [Pieter van Ley] in 1 character.
Pen-and-ink and yellow.
Mounted on cloth backing.
LC Luso-Hispanic World, 67
Indexed.
Available also through the Library of Congress Web site as a raster image.
In lower left corner: Leon.
Annotated in brown ink in lower left corner: 37.
Maggs number annotated in pencil in lower right margin: 23.
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.