Vicente Tofiño's Atlas Marítimo de España and its Derrotero (1787-1789)

A survey of Spain's coasts built, on the certifying board's own account, as one unbroken chain of astronomical and geometric operations — sextant latitudes taken by several observers at once and separately, theodolite bearings from fixed points ashore, and chronometer longitudes cross-checked against eclipses of Jupiter's satellites observed at Paris at the same instant. Its stated purpose, quoted here from the 1787 derrotero, was that navigators everywhere should run fewer risks.