Geodetic surveys

meridian arc from Hammerfest in Norway to the Black Sea

19th-century survey to measure the Indian subcontinent

experiment to determine the mean density of the Earth

network of points with known positions used in geodesy and surveying

Technique of determining the radius of Earth

first comprehensive mapping project (survey) of the Habsburg Empire

18th-century expedition to present-day Ecuador

Mapping of Palestine during mandatory period

First trigonometric survey of Britain