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[Peru, triangulation] Ulloa, Antonio de, Carta Dela Meridiana medida en el Reyno de Quito... Madrid, circa 1748. 9 x 40. Outline color. Two sheets joined, backed. Age-toned, tide mark left margin, else VG. SOLD

Ulloa and fellow Spaniard Jorge Juan were appointed to the French Geodesic Mission to South America. This map demonstrates triangulation to determine the length of a degree of meridian at the equator. Also shows roads, villages, haciendas and topographical features such as volcanoes. With a decorative cartouche featuring llamas, volcanoes. From the Relacion Historica del Viage a la America Meridional.

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