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Rai (area)
The ''rai'', ''ngan'', and ''tarang wa'' or square ''wa'' are customary Thai units of area, used in the measurement of land. They are defined as exactly 1,600, 400, and 4 square metres, respectively (17,222, 4,306, and 43 sq ft). The ''tarang wa'' (square ''wa'', ''tarang'' meaning 'grid') is derived from the area of a square with sides of 1 '' wa'' (the Thai fathom). 1 ''ngan'' ('work') is equal to 100 square ''wa'', and 1 ''rai'' ('field' or 'plantation') equals 4 ''ngan'' or 1 square '' sen''. The units were standardised in square metres when Thailand (then Siam) adopted the metric system The metric system is a system of measurement that standardization, standardizes a set of base units and a nomenclature for describing relatively large and small quantities via decimal-based multiplicative unit prefixes. Though the rules gover ... in 1923, although the Royal Survey Department was already reported in 1908 to be using the metre-based conversion for its cadastral maps. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thai Units
Before metrication, the traditional system of measurement used in Thailand employed anthropic units. Some of these units are still in use, albeit standardised to SI/metric measurements. When the Royal Thai Survey Department began cadastral survey in 1896, Director R. W. Giblin, F.R.G.S., noted, "It so happens that 40 metres or 4,000 centimetres are equal to one ''sen''," so all cadastral plans are plotted, drawn, and printed to a scale of 1:4,000. The square ''wa'', ''ngan'' and ''rai'' are still used in measurements of land area. The ''baht'' is still used as a unit of measurement in gold trading. However, one ''baht'' of 96.5% gold bullion is defined as 15.16 grams rather than the generic standard of 15 grams. The ''baht'' has also become the name of the currency of Thailand, which was originally fixed to the corresponding mass of silver. List of units References {{systems of measurement Thailand Customary units of measurement Units of measurement A unit of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Area
Area is the measure of a region's size on a surface. The area of a plane region or ''plane area'' refers to the area of a shape or planar lamina, while '' surface area'' refers to the area of an open surface or the boundary of a three-dimensional object. Area can be understood as the amount of material with a given thickness that would be necessary to fashion a model of the shape, or the amount of paint necessary to cover the surface with a single coat. It is the two-dimensional analogue of the length of a curve (a one-dimensional concept) or the volume of a solid (a three-dimensional concept). Two different regions may have the same area (as in squaring the circle); by synecdoche, "area" sometimes is used to refer to the region, as in a " polygonal area". The area of a shape can be measured by comparing the shape to squares of a fixed size. In the International System of Units (SI), the standard unit of area is the square metre (written as m2), which is the area o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Square Metre
The square metre ( international spelling as used by the International Bureau of Weights and Measures) or square meter ( American spelling) is the unit of area in the International System of Units (SI) with symbol m2. It is the area of a square with sides one metre in length. Adding and subtracting SI prefixes creates multiples and submultiples; however, as the unit is exponentiated, the quantities grow exponentially by the corresponding power of 10. For example, 1 kilometre is 103 (one thousand) times the length of 1 metre, but 1 square kilometre is (103)2 (106, one million) times the area of 1 square metre, and 1 cubic kilometre is (103)3 (109, one billion) cubic metres. SI prefixes applied The square metre may be used with all SI prefixes used with the metre. Unicode characters Unicode has several characters used to represent metric area units, but these are for compatibility with East Asian character encodings and are meant to be used in new documents. * * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wa (unit)
Wa ( , also ''waa'' or ''wah'', abbreviated ) is a unit of length, equal to two metres (2 m) or four :th:ศอก (หน่วยความยาวไทย), sok (.) ''Wa'' as a verb means to outstretch (one's) arms to both sides, which relates to the fathom's distance between the fingertips of a Man (word), man's outstretched arms. The 1833 Siamese-American Treaty of Amity and Commerce, reads, "[The] Siamese fathom...being computed to contain 78 English or American inches, corresponding to 96 :th:นิ้ว (หน่วยความยาวไทย), Siamese inches." The length then would have been equivalent to a modern 1.981 metres. Since Metrication#Status by country/region, conversion to the metric system in 1923, the length as derived from the metre is precisely two metres, but the unit is neither part of nor recognized by the modern SI, International metric system (SI). Wa also occurs as a colloquialism for "square wa" (tarang wa) a unit of area abbreviated or .) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fathom
A fathom is a unit of length in the imperial and the U.S. customary systems equal to , used especially for measuring the depth of water. The fathom is neither an international standard (SI) unit, nor an internationally accepted non-SI unit. Historically it was the maritime measure of depth in the English-speaking world but, apart from within the US, charts now use metres. There are two yards (6 feet) in an imperial fathom. Originally the span of a man's outstretched arms, the size of a fathom has varied slightly depending on whether it was defined as a thousandth of an (Admiralty) nautical mile or as a multiple of the imperial yard. Formerly, the term was used for any of several units of length varying around . Etymology The term (pronounced ) derives (via Middle English ''fathme'') from the Old English ''fæðm'', which is cognate with the Danish word ''favn'' and means "embracing arms" or "pair of outstretched arms". It is maybe also cognate with the Old High German wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sen (unit)
Before metrication, the traditional system of measurement used in Thailand employed anthropic units. Some of these units are still in use, albeit standardised to SI/metric measurements. When the Royal Thai Survey Department began cadastral survey in 1896, Director R. W. Giblin, F.R.G.S., noted, "It so happens that 40 metres or 4,000 centimetres are equal to one ''sen''," so all cadastral plans are plotted, drawn, and printed to a scale of 1:4,000. The square ''wa'', ''ngan'' and ''rai'' are still used in measurements of land area. The ''baht'' is still used as a unit of measurement in gold trading. However, one ''baht'' of 96.5% gold bullion is defined as 15.16 grams rather than the generic standard of 15 grams. The ''baht'' has also become the name of the Thai baht, currency of Thailand, which was originally fixed to the corresponding mass of silver. List of units References {{systems of measurement Thai units of measurement, Units of measurement by country, Thailand C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metric System
The metric system is a system of measurement that standardization, standardizes a set of base units and a nomenclature for describing relatively large and small quantities via decimal-based multiplicative unit prefixes. Though the rules governing the metric system have changed over time, the modern definition, the International System of Units (SI), defines the metric prefixes and seven base units: metre (m), kilogram (kg), second (s), ampere (A), kelvin (K), Mole (unit), mole (mol), and candela (cd). An SI derived unit is a named combination of base units such as hertz (cycles per second), Newton (unit), newton (kg⋅m/s2), and tesla (unit), tesla (1 kg⋅s−2⋅A−1) and in the case of Celsius a shifted scale from Kelvin. Certain units have been Non-SI units mentioned in the SI#Units officially accepted for use with the SI, officially accepted for use with the SI. Some of these are decimalised, like the litre and electronvolt, and are considered "metric". Others, like ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Thai Survey Department
The Royal Thai Survey Department () is a Special Services Group of Headquarters, Royal Thai Armed Forces () tasked with conducting land and aerial survey, geodesy and geophysics works in Thailand. The headquarters of the Survey Department are located on Kanlayan Maitri Road in the Phra Borom Maha Ratchawang Subdistrict of Phra Nakhon District, Bangkok, and the current Department Director is Lieutenant General Noppadon Chotisiri. Modern map surveying in Thailand began in 1875 during the reign of King Chulalongkorn (Rama V) with the establishment of a Mapping Division under the direction of British expatriate Henry Alabaster to lay out the map for telegraphic activities linking Bangkok to Phra Tabong (Battambang) and also to map around the Thai Gulf.Svasti, Pichay"Mapping Siam's History"Bangkok Post 26 Sep 2013 Prince Damrong (then known as Phra Ong Chao Ditsawarakuman) conceived the idea of forming a Survey Department. King Rama V granted the establishment of the Thai Surv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cadastral Maps
A cadastre or cadaster ( ) is a comprehensive recording of the real estate or real property's metes-and-bounds of a country.Jo Henssen, ''Basic Principles of the Main Cadastral Systems in the World,'/ref> Often it is represented graphically in a cadastral map. In most countries, legal systems have developed around the original administrative systems and use the cadastre to define the dimensions and location of land parcels described in legal documentation. A land parcel or cadastral parcel is defined as "a continuous area, or more appropriately volume, that is identified by a unique set of homogeneous property rights". Cadastral surveys document the Boundary (real estate), boundaries of land ownership, by the production of documents, diagrams, sketches, plans (''plats'' in the US), charts, and maps. They were originally used to ensure reliable facts for land valuation and taxation. An example from early England is the Domesday Book in 1086. Napoleon established a comprehens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Are (unit)
The hectare (; SI symbol: ha) is a Non-SI units mentioned in the SI, non-SI metric unit of area equal to a square with 100-metre sides (1 hm2), that is, square metres (), and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. An acre is about and one hectare contains about . In 1795, when the metric system was introduced, the ''are'' was defined as 100 square metres, or one square decametre, and the hectare ("hecto-" + "are") was thus 100 ''ares'' or km2 ( square metres). When the metric system was further rationalised in 1960, resulting in the International System of Units (), the ''are'' was not included as a recognised unit. The hectare, however, remains as a non-SI unit accepted for use with the SI and whose use is "expected to continue indefinitely". Though the dekare/decare daa () and are (100 m2) are not officially "accepted for use", they are still used in some contexts. Description The hectare (), altho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thai Units Of Measurement
Before metrication, the traditional system of measurement used in Thailand employed anthropic units. Some of these units are still in use, albeit standardised to SI/metric measurements. When the Royal Thai Survey Department began cadastral survey in 1896, Director R. W. Giblin, F.R.G.S., noted, "It so happens that 40 metres or 4,000 centimetres are equal to one ''sen''," so all cadastral plans are plotted, drawn, and printed to a scale of 1:4,000. The square ''wa'', ''ngan'' and ''rai'' are still used in measurements of land area. The ''baht'' is still used as a unit of measurement in gold trading. However, one ''baht'' of 96.5% gold bullion is defined as 15.16 grams rather than the generic standard of 15 grams. The ''baht'' has also become the name of the currency of Thailand, which was originally fixed to the corresponding mass of silver. List of units References {{systems of measurement Thailand Customary units of measurement Units of measurement A unit of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
