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Roman milestone in modern Austria (AD 201), indicating a distance of 28 Roman miles (~41 km) to Teurnia. The basic unit of Roman linear measurement was the pes (plural: pedes) or Roman foot. Investigation of its relation to the English foot goes back at least to 1647, when John Greaves published his Discourse on the Romane foot.
The rod, perch, or pole (sometimes also lug) is a surveyor's tool [1] and unit of length of various historical definitions. In British imperial and US customary units, it is defined as 16 + 1 ⁄ 2 feet, equal to exactly 1 ⁄ 320 of a mile, or 5 + 1 ⁄ 2 yards (a quarter of a surveyor's chain), and is exactly 5.0292 meters.
Allegory of measurement, the decempeda is under the woman's feet with Xs marking the feet subdivisions (by Giovanni Zaratino Castellini , 17th century) The pertica (from Latin: pertica, measuring rod [1]) was a pre-metric unit of either length or area, with the values varying by location. For a similar unit in Northern Europe, see perch.
The Roman measuring rod was 10 Roman feet long, and hence called a decempeda, Latin for 'ten-footer'. It was usually of square section capped at both ends by a metal shoe, and painted in alternating colours. Together with the groma and dioptra, the decempeda formed the basic kit for the Roman surveyors. [20]
This is a list of obsolete units of measurement, ... Perch – most commonly a unit of area, ... Ancient Roman units of measurement;
Detail of a cubit rod in the Museo Egizio of Turin The earliest recorded systems of weights and measures originate in the 3rd or 4th millennium BC. Even the very earliest civilizations needed measurement for purposes of agriculture, construction and trade. Early standard units might only have applied to a single community or small region, with every area developing its own standards for ...
perch, used variously to measure length or area; acre and acre's breadth; furlong; mile; The best-attested of these is the perch, which varied in length from 10 to 25 feet, with the most common value (16 1 ⁄ 2 feet or 5.03 m) remaining in use until the twentieth century. [1] Later development of the English system continued in 1215 in the ...
There is a better statement at Ancient Roman units of measurement which makes the more plausible claim that the Roman unit was decempeda or pertica (perch in English), with value 10 pedes (9.708 ft). Probably this article is trying to say that Romans had a 10-foot perch, but their definition of a foot was different.