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Comprehensive Explanation of the Are as a Unit of Measurement
Definition of the Are
The are is a unit of area measurement in the metric system that specifically means the area of one hectare, being equal to 100 square meters. It is mainly applied in the determination of land area, and it is equal to 12.2921 square meters, or 0.0247 of an acre, or 1076.39 square feet. The is in the International System of Units (SI); however, it is not as popular as the hectare, which is 10,000 m² or 100 ares.
Historical Context
The area was established as a metric system during the French Revolution in 1793 in the late 18th century. Originally, the metric system was designed as one system for the whole of Europe, integrating many different and therefore inconsistent local systems. Despite the are being used in metric countries, people have shifted from using the are, primarily because the hectare is more convenient in large-scale measurements. However, they are still in use in some cases, especially in subsistence farming, nurseries, gardening, or residential houses.
Conversion to Other Units
The are can be converted to various other units of area:
Square Meters:1 Are = 100 square meters. This is the fundamental metric conversion.
Square Feet:1 Are = 1,076.39 square feet. Commonly used in countries like the United States where the Imperial system is prevalent.
Square Yards:1 Are ≈ 119.6 square yards. Useful for land measurement in some English-speaking countries.
Acres:1 Are ≈ 0.0247 acres. Conversion to acres is often necessary for international comparisons or in agricultural and real estate contexts.
Hectares:1 Hectare = 100 Ares. The hectare is more commonly used for measuring large tracts of land, such as farms or forests.
Use in Land Measurement Today
Although the are is no longer utilized much today, it is understood in some areas, mainly in Europe, Asia, and parts of Africa, in measuring Song parcels of land. It is especially relevant for:
Gardens and Small Properties: The are is a convenient unit for measuring residential plots, gardens, or small agricultural fields.
Urban Land Parcels: In urban settings, where land parcels are smaller, the are provides a manageable and precise measurement.
Legal and Administrative Documents: In some countries, land deeds and legal documents may specify land area in ares, particularly for smaller lots.
A square perch is defined as an ancient method of measuring and is more predominantly associated with value estimation of land. It means the area of a square whose sides are of one perch in length with one perch = 16.5 feet, or 5 yards.
1 square perch = 272.25 square feet
1 square perch = 30.25 square yards
It is a smaller unit compared to the acre, often used in older surveying systems and historical contexts.
Conversions to Other Units
The square perch can be converted into several modern and traditional units of area:
Depicted on the left side of figure 3 is the square perch, derived from the rod or perch measure, which has its roots in the Roman Empire and were widely used in medieval England. The concept of square perch became to be adopted as small area measures in the farming and housing developments. In many of the British colonies, such as America and Australia, it was fine measure before the coming of the metric and the modern imperial unit systems.
Comparison with the Acre
The acre is a much larger unit of area than the square perch:
1 acre = 160 square perches This relationship reflects the practicality of the acre for larger land tracts, while the square perch was suited to smaller divisions.
Use in Land Measurement Today
Although the square perch is largely obsolete in contemporary surveying, it remains in limited use in certain regions and contexts:
Australia: Still mentioned in rural land measures and older property documents. Historical records and conventional land appraisals occasionally make reference to the United Kingdom and Ireland.
United States: Infrequently used, although it could be found in historical land survey legal descriptions.
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