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Discrección de la costa de Yucatan, Sonda de Campeche y bajos adjacentes segun su antigua situación con la derrota qe. practicaron en solicitud del Nombrado Negrillo sin encontrar le, el Paqubot del Rei titulado Sn. Carlos al mando del teniente de Navio Dn. Manuel de Alderete y el Bergantin Sn. Juan Nepomuceno al de igual Clase D Andres de Balderrama lo qe. manifiesta la siguiente ; Diseno de la expresada costa y sus baxos correxida segun las mas seguras observaciones y sondas mas prals. que sehan practicado en este reconocimto. preuiniendo qe. la extensión que seda al Veril es correspondiente a los puntos d. sonda allados ahora hasta qe. se compruebe mas prolifamte.

Discrección de la costa de Yucatan, Sonda de Campeche y bajos adjacentes segun su antigua situación con la derrota qe. practicaron en solicitud del Nombrado Negrillo sin encontrar le, el Paqubot del Rei titulado Sn. Carlos al mando del teniente de Navio Dn. Manuel de Alderete y el Bergantin Sn. Juan Nepomuceno al de igual Clase D Andres de Balderrama lo qe. manifiesta la siguiente ; Diseno de la expresada costa y sus baxos correxida segun las mas seguras observaciones y sondas mas prals. que sehan practicado en este reconocimto. preuiniendo qe. la extensión que seda al Veril es correspondiente a los puntos d. sonda allados ahora hasta qe. se compruebe mas prolifamte.

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description

Summary

Shows northern Yucatán Peninsula. Also shows routes of expeditions on 1 map.
Depths shown by soundings.
Watermark: PVL [Pieter van Ley] in 1 character.
Pen-and-ink and red and yellow watercolors.
Mounted on cloth backing.
LC Luso-Hispanic World, 535
Available also through the Library of Congress Web site as a raster image.
Indexed.
Annotated in brown ink in lower left margin: 34.
Maggs number annotated in pencil in lower right margin: 333.
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.

date_range

Date

01/01/1700
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Source

Library of Congress
copyright

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