Mapa geográfico de América Meridional (Madrid, 1775) — the Spanish line that the world's atlases went on printing

In 1775 the royal geographer Juan de la Cruz Cano y Olmedilla issued at Madrid a large map of South America compiled, its own title says, from original maps and reports adjusted to astronomical observations. Its London reissue of 1799 called the original "un Mapa español mui raro", and the boundary engraved on it was still copied by Philadelphia and Paris publishers sixty years later as "the Cruz Cano line". The sources read are papers of a party to the dispute, and the claims say so.