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Anglo-French Survey (1784–1790)
The Anglo-French Survey (1784–1790) was the geodetic survey to measure the relative position of Royal Greenwich Observatory, Greenwich Observatory and the Paris Observatory via triangulation (surveying), triangulation. The English operations, executed by William Roy, consisted of the measurements of bases at Hounslow Heath (1784) and Romney Marsh (1787), the measurements of the angles of the triangles (1787–1788) and finally the calculation of all the triangles (1788–1790). The survey is very significant as the first precise survey within Britain, and the forerunner of the work of the Ordnance Survey which was founded in 1791, one year after Roy's death. Cassini's memoir Late in life, when he was 57, Roy was granted the opportunity to establish his lasting reputation in the world of geodesy. The opening came from a completely unexpected direction. In 1783 César-François Cassini de Thury, Cassini de Thury addressed a memoir Concerning the Latitude and Longitude of Gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geodetic Survey
Geodesy ( ) is the Earth science of accurately measuring and understanding Earth's figure ( geometric shape and size), orientation in space, and gravity. The field also incorporates studies of how these properties change over time and equivalent measurements for other planets (known as ''planetary geodesy''). Geodynamical phenomena, including crustal motion, tides and polar motion, can be studied by designing global and national control networks, applying space geodesy and terrestrial geodetic techniques and relying on datums and coordinate systems. The job title is geodesist or geodetic surveyor. History Definition The word geodesy comes from the Ancient Greek word ''geodaisia'' (literally, "division of Earth"). It is primarily concerned with positioning within the temporally varying gravitational field. Geodesy in the German-speaking world is divided into "higher geodesy" ( or ), which is concerned with measuring Earth on the global scale, and "practical geodes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Land
Common land is land owned by a person or collectively by a number of persons, over which other persons have certain common rights, such as to allow their livestock to graze upon it, to collect Wood fuel, wood, or to cut turf for fuel. A person who has a right in, or over, common land jointly with another or others is usually called a commoner. In the New Forest, the New Forest Commoner is recognised as a minority cultural identity as well as an agricultural vocation, and members of this community are referred to as Commoners. In Great Britain, common land or former common land is usually referred to as a common; for instance, Clapham Common and Mungrisdale Common. Due to enclosure, the extent of common land is now much reduced from the millions of acres that existed until the 17th century, but a considerable amount of common land still exists, particularly in upland areas. There are over 8,000 registered commons in England alone. Origins Originally in medieval England the co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Figure Of The Earth
Figure of the Earth is a Jargon, term of art in geodesy that refers to the size and shape used to model Earth. The size and shape it refers to depend on context, including the precision needed for the model. A Spherical Earth, sphere is a well-known historical approximation of the figure of the Earth that is satisfactory for many purposes. Several models with greater accuracy (including Earth ellipsoid, ellipsoid) have been developed so that Geographic coordinate system, coordinate systems can serve the precise needs of navigation, surveying, cadastre, land use, and various other concerns. Motivation Earth's Topography, topographic surface is apparent with its variety of land forms and water areas. This topographic surface is generally the concern of topographers, Hydrography, hydrographers, and Geophysics, geophysicists. While it is the surface on which Earth measurements are made, mathematically modeling it while taking the irregularities into account would be extremely compl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dunkirk
Dunkirk (french: Dunkerque ; vls, label=French Flemish, Duunkerke; nl, Duinkerke(n) ; , ;) is a commune in the department of Nord in northern France.Commune de Dunkerque (59183) INSEE It lies from the border. It has the third-largest French harbour. The population of the commune in 2019 was 86,279. Etymology and language use The name of Dunkirk derives from '' or ' |
Anglo-French Survey Of 1784-1790 Proposed Mesh
Anglo-French (or sometimes Franco-British) may refer to: *France–United Kingdom relations * Anglo-Norman language or its decendants, varieties of French used in medieval England *Anglo-Français and Français (hound), an ancient type of hunting dog *Anglo-French (automobile), made in Birmingham, England 1896–7 *Franglais Franglais (; also Frenglish ) is a French blend that referred first to the overuse of English words by French speakers and later to diglossia or the macaronic mixture of French () and English (). Etymology The word ''Franglais'' was first at ..., a Macaronic mixture of French and English languages * A person or family of English and French ancestry {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ramsden Surveying Instruments
The Ramsden surveying instruments are those constructed by Jesse Ramsden and used in high precision geodetic surveys carried out in the period 1784 to 1853. This includes the five great theodolites—great in name, great in size and great in accuracy—used in surveys of Britain and other parts of the world. Ramsden also provided the equipment used in the measurement of the many base lines of these surveys and also the zenith telescope used in latitude determinations. The great theodolites A total of eight such instruments were manufactured by Ramsden and others for use in Britain, India and Switzerland. The Great Theodolites Ramsden himself constructed three theodolites and a further two were completed to his design by Mathew Berge, his son-in-law and business successor, after Ramsden's death in 1805. Of the other instruments one was constructed by William Cary and the other two by the firm of Troughton and Simms. The Royal Society theodolite In 1783 the Royal Society of London ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heathrow (hamlet)
Heathrow or Heath Row was a wayside hamlet along a minor country lane called Heathrow Road in the ancient parish of Harmondsworth, Middlesex, England, on the outskirts of what is now Greater London. Its buildings and all associated holdings were demolished, along with almost all of the often grouped locality of The Magpies in 1944 for the construction of Heathrow Airport. The name Heathrow described its layout: a lane, on one side smallholdings and farms of fields and orchards which ran for a little over a , on the other, until the 1819 Inclosure for farmland, common land: a mixture of pasture, hunting and foraging land on less fertile heath. Akin to Sipson Green it was a scattered agricultural locality of Harmondsworth. The two lightly populated places dotted the brickearth-over-gravel soils in the east of Harmondsworth which historically butted on to Hounslow Heath. Yards from the lane, while the heath existed, General William Roy mapped one end of the first baseline for meas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theodolite
A theodolite () is a precision optical instrument for measuring angles between designated visible points in the horizontal and vertical planes. The traditional use has been for land surveying, but it is also used extensively for building and infrastructure construction, and some specialized applications such as meteorology and rocket launching. It consists of a moveable telescope mounted so it can rotate around horizontal and vertical axes and provide angular readouts. These indicate the orientation of the telescope, and are used to relate the first point sighted through the telescope to subsequent sightings of other points from the same theodolite position. These angles can be measured with accuracies down to microradians or seconds of arc. From these readings a plan can be drawn, or objects can be positioned in accordance with an existing plan. The modern theodolite has evolved into what is known as a total station where angles and distances are measured electronically, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cannon In Roy Grove Hampton
A cannon is a large- caliber gun classified as a type of artillery, which usually launches a projectile using explosive chemical propellant. Gunpowder ("black powder") was the primary propellant before the invention of smokeless powder during the late 19th century. Cannons vary in gauge, effective range, mobility, rate of fire, angle of fire and firepower; different forms of cannon combine and balance these attributes in varying degrees, depending on their intended use on the battlefield. A cannon is a type of heavy artillery weapon. The word ''cannon'' is derived from several languages, in which the original definition can usually be translated as ''tube'', ''cane'', or ''reed''. In the modern era, the term ''cannon'' has fallen into decline, replaced by ''guns'' or ''artillery'', if not a more specific term such as howitzer or mortar, except for high-caliber automatic weapons firing bigger rounds than machine guns, called autocannons. The earliest known depiction ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copley Medal
The Copley Medal is an award given by the Royal Society, for "outstanding achievements in research in any branch of science". It alternates between the physical sciences or mathematics and the biological sciences. Given every year, the medal is the oldest Royal Society medal awarded and the oldest surviving scientific award in the world, having first been given in 1731 to Stephen Gray (scientist), Stephen Gray, for "his new Electrical Experiments: – as an encouragement to him for the readiness he has always shown in obliging the Society with his discoveries and improvements in this part of Natural Knowledge". __TOC__ History The medal was created following a donation of Pound sterling, £100 to be used for carrying out experiments by Sir Godfrey Copley, 2nd Baronet, Sir Godfrey Copley, for which the interest on the amount was used for several years. The conditions for the medal have been changed several times; in 1736, it was suggested that "a medal or other honorary prize s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Banstead
Banstead is a town in the borough of Reigate and Banstead in Surrey, England. It is south of Sutton, south-west of Croydon, south-east of Kingston-upon-Thames, and south of Central London. On the North Downs, it is on three of the four main compass points separated from other settlements by open area buffers with Metropolitan Green Belt status. Banstead Downs, although a fragment of its larger historic area and spread between newer developments, is a Site of Special Scientific Interest (SSSI). One of the Banstead wards is "Banstead Village". The civil parish was abolished when Banstead Urban District was created. Both included many outlying parts as well as the main settlement. The contiguous ward of Nork, which contains Banstead station, shares in many amenities of Banstead and is included in county-level population analyses of Banstead but not the central-government-drawn Banstead Built-up Area. The latter takes in Burgh Heath and held 15,469 residents as at the 2011 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Workhouse
In Britain, a workhouse () was an institution where those unable to support themselves financially were offered accommodation and employment. (In Scotland, they were usually known as poorhouses.) The earliest known use of the term ''workhouse'' is from 1631, in an account by the mayor of Abingdon reporting that "we have erected wthn our borough a workhouse to set poorer people to work". The origins of the workhouse can be traced to the Statute of Cambridge 1388, which attempted to address the labour shortages following the Black Death in England by restricting the movement of labourers, and ultimately led to the state becoming responsible for the support of the poor. However, mass unemployment following the end of the Napoleonic Wars in 1815, the introduction of new technology to replace agricultural workers in particular, and a series of bad harvests, meant that by the early 1830s the established system of poor relief was proving to be unsustainable. The New Poor Law of 1834 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
