Editing Rod (unit) (section)

===In ancient cultures===
The '''perch''' ([[Pertica (unit)|pertica]]) as a [[Ancient Roman units of measurement|lineal measure in Rome]] (also ''decempeda'') was 10 Roman feet (2.96 metres), and in [[France]] varied from 10 feet (''perche romanie'') to 22 feet (''perche d'arpent''—apparently {{frac|1|10}} of "the range of an arrow"—about 220 feet). To confuse matters further, by ancient Roman definition, an arpent equalled 120 Roman feet. The related unit of square measure was the ''scrupulum'' or ''decempeda quadrata'', equivalent to about {{convert|8.76|m2|sqft|abbr=on}}.<ref name=smith/>