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The milestone or ban pole at Halfweg, 1780. Creator: Jacques KuyperThe milestone or ban pole at Halfweg, 1780. Stone distance marker at Halfweg (halfway)
Jean Baptiste Joseph Delambre, French mathematician and astronomer, (1836). Artist: B HollJean Baptiste Joseph Delambre, French mathematician and astronomer, (1836). Delambre (1749-1822) was Director of the Paris Observatory
Measuring the distance from ship to shore, using a quadrant marked with shadow-scales, 1598. From L usa della squadra mobile by Ottavius Fabri. (Venice, 1598)
Cross-staffs used for surveying, 1551. In this case they are being used to measure the width of a river by triangulation. From Rudimenta Mathematica by Sebastian Munster. (Basel, 1551)
Measuring the distance of an inaccessible object by triangulation using a hinged staff, 1617-1619. From Utriusque cosmi...historia by Robert Fludd. (Oppenheim, 1617-1619)
Finding the angular distance between two edges of a wood using a cross-staff, 1617-1619. From Utriusque cosmi...historia by Robert Fludd. (Oppenheim, 1617-1619)
Pierre-Louis Moreau de Maupertuis, French astronomer and mathematician, in Finland, 1736, (1874). In 1736 Maupertuis (1698-1759)
Map of Palestine based on ancient authors, c1830Map of Palestine showing distances in Roman miles, based on various ancient authors and the Jerusalem Itinerary. Engraving c1830
