139-460: A leat ( / ˈ l iː t / ; also lete or leet , or millstream ) is the name, common in the south and west of England and in Wales , for an artificial watercourse or aqueduct dug into the ground, especially one supplying water to a watermill or its mill pond . Other common uses for leats include delivery of water for hydraulic mining and mineral concentration , for irrigation , to serve
278-542: A dye works or other industrial plant, and provision of drinking water to a farm or household or as a catchment cut-off to improve the yield of a reservoir . According to the Oxford English Dictionary , leat is cognate with let in the sense of "allow to pass through". Other names for the same thing include fleam (probably a leat supplying water to a mill that did not have a millpool). In parts of northern England, for example around Sheffield ,
417-419: A Labour dominance of Welsh politics that continued into the 21st century. After economic growth in the first two decades of the 20th century, Wales's staple industries endured a prolonged slump from the early 1920s to the late 1930s, leading to widespread unemployment and poverty. For the first time in centuries, the population of Wales went into decline; unemployment reduced only with the production demands of
556-421: A Welsh constituency at Westminster. Yet by 1906, industrial dissension and political militancy had begun to undermine Liberal consensus in the southern coalfields. In 1916, David Lloyd George became the first Welshman to become Prime Minister of Britain. In December 1918, Lloyd George was re-elected as the head of a Conservative-dominated coalition government, and his poor handling of the 1919 coal miners' strike
695-656: A close, arranging mountain-top parties with enormous plum puddings . The British Geological Survey was founded in 1835 as the Ordnance Geological Survey under Henry De la Beche , and remained a branch of the Ordnance Survey until 1965. At the same time, the uneven quality of the English and Scottish maps was being improved by engravers under Benjamin Baker . By the time Colby retired in 1846,
834-732: A feat with neither precedent nor successor." Owain Gwynedd (1100–1170) of the Aberffraw line was the first Welsh ruler to use the title princeps Wallensium (prince of the Welsh), a title of substance given his victory on the Berwyn range , according to Davies. During this time, between 1053 and 1063, Wales lacked any internal strife and was at peace. Within four years of the Battle of Hastings (1066), England had been completely subjugated by
973-531: A fire in the Tower of London , the headquarters of the survey was moved to Southampton taking over buildings previously occupied by a military orphanage (the Royal Military Asylum ) in 1841, and Yolland was put in charge, but Hall sent him off to Ireland so that when Hall left in 1854 Yolland was again passed over in favour of Major Henry James . Hall was enthusiastic about extending the survey of
1112-479: A large range of paper maps and digital mapping products. The Ordnance Survey's flagship digital product, launched in November 2001, is OS MasterMap , a database that records, in one continuous digital map, every fixed feature of Great Britain larger than a few metres. Every feature is given a unique TOID (TOpographical IDentifier), a simple identifier that includes no semantic information. Typically, each TOID
1251-689: A legal unit in its own right, although it remains part of the single jurisdiction of England and Wales . The Senedd has the authority to draft and approve laws outside of the UK Parliamentary system to meet the specific needs of Wales. Under powers approved by a referendum held in March 2011, it is empowered to pass primary legislation, at the time referred to as an Act of the National Assembly for Wales but now known as an Act of Senedd Cymru in relation to twenty subjects listed in
1390-585: A new survey based on Airy 's spheroid in 1858, completing the Principal Triangulation . The following year, he completed an initial levelling of the country. After the Ordnance Survey published its first large-scale maps of Ireland in the mid-1830s, the Tithe Act 1836 led to calls for a similar six-inch to the mile survey in England and Wales . Official procrastination followed, but
1529-501: A proportion of its profits to the Treasury. In 2010, OS announced that printing and warehouse operations were to be outsourced, ending over 200 years of in-house printing. The Frome-based firm Butler, Tanner and Dennis (BT&D) secured its printing contract. As already stated, large-scale maps had not been printed at the Ordnance Survey since the common availability of geographical information systems (GISs), but, until late 2010,
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#17327797550681668-477: A second edition of the town plans: by 1909 only fourteen places had paid for updates. The review determined that revision of 1:2500 mapping should proceed apace. The most detailed mapping of London was the OS's 1:1056 survey between 1862 and 1872, which took 326 sheets to cover the capital; a second edition (which needed 759 sheets because of urban expansion) was completed and brought out between 1891 and 1895. London
1807-464: A series of castles: Beaumaris , Caernarfon , Harlech and Conwy . His son, the future Edward II , was born at Caernarfon in 1284. He became the first English prince of Wales in 1301, which at the time provided an income from northwest Wales known as the Principality of Wales . After the failed revolt in 1294–1295 of Madog ap Llywelyn – who styled himself Prince of Wales in
1946-620: A system of government with a separate executive, the Welsh Government, drawn from and accountable to the legislature, the National Assembly. Following a successful referendum in 2011, the National Assembly was empowered to make laws, known as Acts of the Assembly, on all matters in devolved subject areas, without requiring the UK Parliament's approval of legislative competence. It also gained powers to raise taxes. In May 2020,
2085-533: A varying degree and (since 2011) Welsh is the only official ( de jure ) language in any part of Great Britain. Wales is a country that is part of the sovereign state of the United Kingdom. ISO 3166-2:GB formerly defined Wales as a principality, with England and Scotland defined as countries and Northern Ireland as a province. However, this definition was raised in the Welsh Assembly in 2010 and
2224-589: A victory for the Celtic Britons at Badon Hill against the Saxons, which was attributed to Arthur by Nennius . Having lost much of what is now the West Midlands to Mercia in the 6th and early 7th centuries, a resurgent late-7th-century Powys checked Mercian advances. Æthelbald of Mercia , looking to defend recently acquired lands, had built Wat's Dyke . According to Davies, this had been with
2363-599: Is Cymry , and Cymru is the Welsh name for Wales. These words (both of which are pronounced [ˈkəm.rɨ] ) are descended from the Brythonic word combrogi , meaning "fellow-countrymen", and probably came into use before the 7th century. In literature, they could be spelt Kymry or Cymry , regardless of whether it referred to the people or their homeland. The Latinised forms of these names, Cambrian , Cambric and Cambria , survive as names such as
2502-583: Is associated with a polygon that represents the area on the ground that the feature covers, in National Grid coordinates. OS MasterMap is offered in themed layers, each linked to a number of TOIDs. In September 2010, the layers were: Topography: Integrated transport network: Imagery Address: Address 2: ITN was withdrawn in April 2019 and replaced by OS MasterMap Highways Network The Address layers were withdrawn in about 2016 with
2641-521: Is a generally mountainous country on the western side of central southern Great Britain. It is about 170 miles (270 km) north to south. The oft-quoted " size of Wales " is about 20,779 km (8,023 sq mi). Wales is bordered by England to the east and by sea in all other directions: the Irish Sea to the north and west, St George's Channel and the Celtic Sea to the southwest and
2780-562: Is bordered by the Irish Sea to the north and west, England to the east , the Bristol Channel to the south, and the Celtic Sea to the south-west. As of 2021 , it had a population of 3.2 million. It has a total area of 21,218 square kilometres (8,192 sq mi) and over 2,700 kilometres (1,680 mi) of coastline . It is largely mountainous with its higher peaks in the north and central areas, including Snowdon ( Yr Wyddfa ), its highest summit. The country lies within
2919-489: Is coal mining which became the industry synonymous with Wales and its people. Initially, coal seams were exploited to provide energy for local metal industries but, with the opening of canal systems and later the railways, Welsh coal mining saw an explosion in demand. As the South Wales Coalfield was exploited, Cardiff, Swansea, Penarth and Barry grew as world exporters of coal. By its height in 1913, Wales
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#17327797550683058-461: Is described as a country rather than a principality.' In the House of Commons – the 650-member lower house of the UK Parliament – there are 32 members of Parliament (MPs) who represent Welsh constituencies . At the 2024 general election , 27 Labour and Labour Co-op MPs were elected, along with 4 Plaid Cymru MPs and 1 Liberal Democrat MP from Wales. The Wales Office is a department of
3197-447: Is largely livestock-based, making Wales a net exporter of animal produce, contributing towards national agricultural self-sufficiency . Both Welsh and English are official languages . A majority of the population of Wales speaks English. Welsh is the dominant language in parts of the north and west , with a total of 538,300 Welsh speakers across the entire country. Wales has four UNESCO world heritage sites , of which three are in
3336-511: The Aberffraw dynasty from Gwynedd and Powys and then codified Welsh law in the 940s. Gruffydd ap Llywelyn was the only ruler to unite all of Wales under his rule, described by one chronicler after his death as king of Wales . In 1055 Gruffydd ap Llywelyn killed his rival Gruffydd ap Rhydderch in battle and recaptured Deheubarth . Originally king of Gwynedd, by 1057 he was ruler of Wales and had annexed parts of England around
3475-482: The Bristol Channel to the south. Wales has about 1,680 miles (2,700 km) of coastline (along the mean high water mark), including the mainland, Anglesey , and Holyhead . Over 50 islands lie off the Welsh mainland, the largest being Anglesey, in the north-west. Ordnance Survey The Ordnance Survey ( OS ) is the national mapping agency for Great Britain. The agency's name indicates its original military purpose (see ordnance and surveying ), which
3614-702: The British Library . Roy later had an illustrious career in the Royal Engineers (RE), rising to the rank of General, and he was largely responsible for the British share of the work in determining the relative positions of the French and British royal observatories. This work was the starting point of the Principal Triangulation of Great Britain (1783–1853), and led to the creation of the Ordnance Survey itself. Roy's technical skills and leadership set
3753-541: The Cambrian Mountains and the Cambrian geological period. Wales has been inhabited by modern humans for at least 29,000 years. Continuous human habitation dates from the end of the last ice age , between 12,000 and 10,000 years before present (BP) , when Mesolithic hunter-gatherers from Central Europe began to migrate to Great Britain. At that time, sea levels were much lower than today. Wales
3892-722: The Copyright Libraries hold complete or near-complete collections of pre-digital OS mapping. The origins of the Ordnance Survey lie in the aftermath of the Jacobite rising of 1745 . Prince William, Duke of Cumberland realised that the British Army did not have a good map of the Scottish Highlands to locate Jacobite dissenters such as Simon Fraser, 11th Lord Lovat so that they could be put on trial. In 1747, Lieutenant-Colonel David Watson proposed
4031-629: The Department for Business, Energy and Industrial Strategy (BEIS) appointed Steve Blair as the Chief Executive of the Ordnance Survey. The Ordnance Survey supported the launch of the Slow Ways initiative, which encourages users to walk on lesser used paths between UK towns. On 7 February 2023, ownership of Ordnance Survey Ltd passed to the newly formed Department for Science, Innovation and Technology . The Ordnance Survey produces
4170-668: The Fifteen Tribes of Wales . The 400-year period following the collapse of Roman rule is the most difficult to interpret in the history of Wales. After the Roman departure in AD 410, much of the lowlands of Britain to the east and south-east was overrun by various Germanic peoples , commonly known as Anglo-Saxons. Some have theorized that the cultural dominance of the Anglo-Saxons was due to apartheid-like social conditions in which
4309-732: The Government of Wales Act 2006 such as health and education. Through this primary legislation, the Welsh Government can then also enact more specific subordinate legislation . Wales is served by four regional police forces: Dyfed-Powys Police , Gwent Police , North Wales Police , and South Wales Police . There are five prisons in Wales : four in the southern half of the country, and one in Wrexham . Wales has no women's prisons: female inmates are imprisoned in England. Wales
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4448-558: The Normans . William I of England established a series of lordships, allocated to his most powerful warriors, along the Welsh border, their boundaries fixed only to the east (where they met other feudal properties inside England). Starting in the 1070s, these lords began conquering land in southern and eastern Wales, west of the River Wye . The frontier region, and any English-held lordships in Wales, became known as Marchia Wallie ,
4587-619: The OS Explorer and OS Landranger series were printed in Maybush. In April 2009 building began of a new head office in Adanac Park on the outskirts of Southampton. By 10 February 2011 virtually all staff had relocated to the new "Explorer House" building and the old site had been sold off and redeveloped. Prince Philip officially opened the new headquarters building on 4 October 2011. On 22 January 2015 plans were announced for
4726-553: The Ordnance Survey National Grid 1:1250s, 1:2500s and 1:10,560s after the Second World War. During World War I, the Ordnance Survey was involved in preparing maps of France and Belgium . During World War II, many more maps were created, including: After the war, Colonel Charles Close , then Director General, developed a strategy using covers designed by Ellis Martin to increase sales in
4865-552: The Penmachno Document – and the rising of Llywelyn Bren (1316), the last uprising was led by Owain Glyndŵr , against Henry IV of England . In 1404, Owain was crowned prince of Wales in the presence of emissaries from France, Spain (Castille) and Scotland. Glyndŵr went on to hold parliamentary assemblies at several Welsh towns, including a Welsh parliament ( Welsh : senedd ) at Machynlleth . The rebellion
5004-644: The Pilgrims' Way in the North Downs labelled the wrong route, but the name stuck. Similarly, the spelling of Scafell and Scafell Pike copied an error on an earlier map, and was retained as this was the name of a corner of one of the Principal Triangles , despite "Scawfell" being the almost universal form at the time. Colby believed in leading from the front, travelling with his men, helping to build camps and, as each survey session drew to
5143-579: The Romans , and can still be seen at many sites, such as the Dolaucothi goldmines. They used the aqueducts to prospect for ores by sluicing away the overburden of soil to reveal the bedrock in a method known as hushing . They could then attack the ore veins by fire-setting , quench with water from a tank above the workings, and remove the debris with waves of water, a method still used in hydraulic mining . The water supply could then be used for washing
5282-665: The Second World War . The war saw Welsh servicemen and women fight in all major theatres, with some 15,000 of them killed. Bombing raids brought high loss of life as the German Air Force targeted the docks at Swansea , Cardiff and Pembroke . After 1943, 10 per cent of Welsh conscripts aged 18 were sent to work in the coal mines, where there were labour shortages; they became known as Bevin Boys . Pacifist numbers during both World Wars were fairly low, especially in
5421-686: The Welsh Marches , in which the Marcher lords were subject to neither English nor Welsh law . The extent of the March varied as the fortunes of the Marcher lords and the Welsh princes ebbed and flowed. Owain Gwynedd 's grandson Llywelyn Fawr (the Great, 1173–1240), received the fealty of other Welsh lords in 1216 at the council at Aberdyfi , becoming in effect the first prince of Wales . His grandson Llywelyn ap Gruffudd secured
5560-657: The Welsh Revolt against English rule in the early 15th century, and briefly re-established an independent Welsh state with its own national parliament ( Welsh : senedd ). In the 16th century the whole of Wales was annexed by England and incorporated within the English legal system under the Laws in Wales Acts 1535 and 1542 . Distinctive Welsh politics developed in the 19th century. Welsh Liberalism , exemplified in
5699-405: The nearby valleys . The eastern region of North Wales has about a sixth of the overall population, with Wrexham being the largest northern city. The remaining parts of Wales are sparsely populated . Since decline of the country's traditional extractive and heavy industries, the public sector , light and service industries, and tourism play major roles in its economy . Agriculture in Wales
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5838-437: The north temperate zone and has a changeable, maritime climate . Its capital and largest city is Cardiff . A distinct Welsh culture emerged among the Celtic Britons after the Roman withdrawal from Britain in the 5th century, and Wales was briefly united under Gruffydd ap Llywelyn in 1055. After over 200 years of war, the conquest of Wales by King Edward I of England was completed by 1283, though Owain Glyndŵr led
5977-567: The 18th century, lawyers, doctors, estate agents and government officials formed a bourgeoisie with sizeable houses. In the late 18th century, slate quarrying began to expand rapidly, most notably in North Wales. The Penrhyn quarry , opened in 1770 by Richard Pennant, 1st Baron Penrhyn , was employing 15,000 men by the late 19th century, and along with Dinorwic quarry , it dominated the Welsh slate trade. Although slate quarrying has been described as "the most Welsh of Welsh industries", it
6116-498: The 1:10,560 "six inches to the mile " scale in the 1950s.) These large scale maps are typically used in professional land-use contexts and were available as sheets until the 1980s, when they were digitised . Small-scale mapping for leisure use includes the 1:25,000 "Explorer" series, the 1:50,000 "Landranger" series and the 1:250,000 road maps. These are still available in traditional sheet form. Ordnance Survey maps remain in copyright for 50 years after their publication. Some of
6255-454: The Board received the newer Ramsden theodolite (an improved successor to the one that Roy had used in 1784), and work began on mapping southern Great Britain using a 5 mi (8 km) baseline on Hounslow Heath that Roy himself had previously measured; it crosses the present Heathrow Airport . In 1991, Royal Mail marked the bicentenary by issuing a set of postage stamps featuring maps of
6394-718: The Britons were at a disadvantage. By AD 500 the land that would become Wales had divided into a number of kingdoms free from Anglo-Saxon rule. The kingdoms of Gwynedd , Powys , Dyfed , Caredigion , Morgannwg , the Ystrad Tywi , and Gwent emerged as independent Welsh successor states . Archaeological evidence, in the Low Countries and what was to become England, shows early Anglo-Saxon migration to Great Britain reversed between 500 and 550, which concurs with Frankish chronicles. John Davies notes this as consistent with
6533-663: The Celtic languages arrived in Britain around 600 BCE. The Brythonic languages ceased to be spoken in England and were replaced by the English language, a Germanic language which arrived in Wales around the end of the eighth century due to the defeat of the Kingdom of Powys . The Bible translations into Welsh and the Protestant Reformation , which encouraged use of the vernacular in religious services, helped
6672-471: The Empire. Further Roman influence came through the spread of Christianity, which gained many followers when Christians were allowed to worship freely; state persecution ceased in the 4th century, as a result of Constantine the Great issuing an edict of toleration in 313. Early historians, including the 6th-century cleric Gildas , have noted 383 as a significant point in Welsh history. In that year,
6811-750: The English Crown, separate from England but under the same monarch. The king ruled directly in two areas: the Statute divided the north and delegated administrative duties to the Justice of Chester and Justiciar of North Wales , and further south in western Wales the King's authority was delegated to the Justiciar of South Wales . The existing royal lordships of Montgomery and Builth Wells remained unchanged. To maintain his dominance, Edward constructed
6950-411: The Kentish village of Hamstreet . In 1801, the first one-inch-to-the-mile (1:63,360 scale) map was published, detailing the county of Kent , with Essex following shortly afterwards. The Kent map was published privately and stopped at the county border, while the Essex maps were published by the Ordnance Survey and ignored the county border, setting the trend for future Ordnance Survey maps. During
7089-572: The Late Bronze Age as part of a maritime trading-networked culture that included other Celtic nations . This "Atlantic-Celtic" view is opposed by others who hold that the Celtic languages derive their origins from the more easterly Hallstatt culture . By the time of the Roman invasion of Britain the area of modern Wales had been divided among the tribes of the Deceangli (north-east), Ordovices (north-west), Demetae (south-west), Silures (south-east), and Cornovii (east). The Roman conquest of Wales began in AD 48 and took 30 years to complete;
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#17327797550687228-469: The National Assembly for Wales) in 1998, responsible for a range of devolved policy matters . At the dawn of the Industrial Revolution , development of the mining and metallurgical industries transformed the country from an agricultural society into an industrial one; the South Wales Coalfield 's exploitation caused a rapid expansion of Wales's population. Two-thirds of the population live in South Wales , including Cardiff, Swansea , Newport , and
7367-403: The National Assembly was renamed "Senedd Cymru" or "the Welsh Parliament", commonly known as the Senedd in both English and Welsh. Devolved areas of responsibility include agriculture, economic development, education, health, housing, local government, social services, tourism, transport and the Welsh language. The Welsh Government also promotes Welsh interests abroad. By tradition, Welsh Law
7506-499: The Norsemen occupying Northumbria to conquer the north. This alliance later broke down and Anarawd came to an agreement with Alfred , king of Wessex , with whom he fought against the west Welsh. According to Annales Cambriae , in 894, "Anarawd came with the Angles and laid waste to Ceredigion and Ystrad Tywi ." The southern and eastern parts of Great Britain lost to English settlement became known in Welsh as Lloegyr (Modern Welsh Lloegr ), which may have referred to
7645-494: The Roman general Magnus Maximus , or Macsen Wledig, stripped Britain of troops to launch a successful bid for imperial power, continuing to rule Britain from Gaul as emperor, and transferring power to local leaders. The earliest Welsh genealogies cite Maximus as the founder of several royal dynasties, and as the father of the Welsh Nation. He is given as the ancestor of a Welsh king on the Pillar of Eliseg , erected nearly 500 years after he left Britain, and he figures in lists of
7784-440: The Romans, Caerwent , is in south east Wales. Both Caerwent and Carmarthen , also in southern Wales, became Roman civitates . Wales had a rich mineral wealth. The Romans used their engineering technology to extract large amounts of gold, copper, and lead, as well as lesser amounts of zinc and silver. No significant industries were located in Wales in this time; this was largely a matter of circumstance as Wales had none of
7923-431: The Second World War, which was seen as a fight against fascism . Plaid Cymru was formed in 1925, seeking greater autonomy or independence from the rest of the UK. The term " England and Wales " became common for describing the area to which English law applied, and in 1955 Cardiff was proclaimed as Wales's capital. Cymdeithas yr Iaith Gymraeg (The Welsh Language Society) was formed in 1962, in response to fears that
8062-469: The UK government responsible for Wales, whose minister, the Secretary of State for Wales (Welsh secretary), sits in the UK cabinet . Wales has a devolved , unicameral legislature known as the Senedd (Senedd Cymru – Welsh Parliament) which holds devolved powers from the UK Parliament via a reserved powers model. For the purposes of local government , Wales has been divided into 22 council areas since 1996. These "principal areas" are responsible for
8201-511: The agreement of king Elisedd ap Gwylog of Powys, as this boundary, extending north from the valley of the River Severn to the Dee estuary, gave him Oswestry . Another theory, after carbon dating placed the dyke's existence 300 years earlier, is that it was built by the post-Roman rulers of Wroxeter . King Offa of Mercia seems to have continued this initiative when he created a larger earthwork, now known as Offa's Dyke ( Clawdd Offa ). Davies wrote of Cyril Fox 's study of Offa's Dyke: "In
8340-413: The border. He ruled Wales with no internal battles. His territories were again divided into the traditional kingdoms. John Davies states that Gruffydd was "the only Welsh king ever to rule over the entire territory of Wales... Thus, from about 1057 until his death in 1063, the whole of Wales recognised the kingship of Gruffydd ap Llywelyn . For about seven brief years, Wales was one, under one ruler,
8479-404: The centre of Southampton (made worse by the bomb damage of the Second World War). The bombing during the Blitz devastated Southampton in November 1940 and destroyed most of the Ordnance Survey's city centre offices . Staff were dispersed to other buildings and to temporary accommodation at Chessington and Esher, Surrey, where they produced 1:25000 scale maps of France, Italy, Germany and most of
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#17327797550688618-426: The city's court complex. The new head office building was designed by the Ministry of Public Building and Works for 4000 staff, including many new recruits who were taken on in the late 1960s and early 1970s as draughtsmen and surveyors. The buildings originally contained factory-floor space for photographic processes such as heliozincography and map printing, as well as large buildings for storing flat maps. Above
8757-455: The compilation of a map of the Highlands to help in pacifying the region. In response, King George II charged Watson with making a military survey of the Highlands under the command of the Duke of Cumberland. Among Watson's assistants were William Roy , Paul Sandby and John Manson. The survey was produced at a scale of 1 inch to 1,000 yards (1:36,000) and included " the Duke of Cumberland's Map " (primarily by Watson and Roy), now held in
8896-444: The contour to the reservoir. Such leats are common around reservoirs in the uplands of Wales. Leats were built to work lead , tin and silver ores in mining areas of Wales , Cornwall , Devon , the Pennines and the Leadhills / Wanlockhead area of Southern Scotland from the 17th century onwards. They were used to supply water for hushing mineral deposits, washing ore and powering mills. Leats were also used extensively by
9035-418: The creation of a Welsh assembly with an 80 per cent majority. In 1997, a second referendum on the same issue secured a very narrow majority (50.3 per cent). The National Assembly for Wales ( Cynulliad Cenedlaethol Cymru ) was set up in 1999 (under the Government of Wales Act 1998 ) with the power to determine how Wales's central government budget is spent and administered, although the UK Parliament reserved
9174-433: The development of the railways added to pressure that resulted in the Ordnance Survey Act 1841 ( 4 & 5 Vict. c. 30). This granted a right to enter property for the purpose of the survey. Following a fire at its headquarters at the Tower of London in 1841 the Ordnance Survey relocated to a site in Southampton and was in disarray for several years, with arguments about which scales to use. Major-General Sir Henry James
9313-442: The dominant source of wealth. The emerging industrial period saw the development of copper smelting in the Swansea area. With access to local coal deposits and a harbour that connected it with Cornwall's copper mines in the south and the large copper deposits at Parys Mountain on Anglesey, Swansea developed into the world's major centre for non-ferrous metal smelting in the 19th century. The second metal industry to expand in Wales
9452-459: The early 1940s, the OS produced many "restricted" versions of the County Series maps and other War Department sheets for War Office purposes, in a variety of large scales that included details of military significance such as dockyards, naval installations, fortifications and military camps. Apart from a brief period during the disarmament talks of the 1930s, these areas were left blank or incomplete on standard maps. The War Department 1:2500s, unlike
9591-420: The early 20th century by David Lloyd George , was displaced by the growth of socialism and the Labour Party . Welsh national feeling grew over the century: a nationalist party, Plaid Cymru , was formed in 1925, and the Welsh Language Society in 1962. A governing system of Welsh devolution is employed in Wales, of which the most major step was the formation of the Senedd (Welsh Parliament, formerly
9730-410: The end of the 1960s, the policy of bringing businesses into disadvantaged areas of Wales through financial incentives had proven very successful in diversifying the industrial economy. This policy, begun in 1934, was enhanced by the construction of industrial estates and improvements in transport communications, most notably the M4 motorway linking south Wales directly to London. It was believed that
9869-415: The equivalent word is goit . In southern England, a leat used to supply water for water-meadow irrigation is often called a carrier , top carrier , or main . Leats generally start some distance (a few hundred metres/yards, or perhaps several miles/kilometres) above the mill or other destination, where an offtake or sluice gate diverts a proportion of the water from a river or stream . A weir in
10008-466: The first written evidence of the use of Cymru and y Cymry is found in a praise poem to Cadwallon ap Cadfan ( Moliant Cadwallon , by Afan Ferddig ) c. 633 . In Armes Prydein , believed to be written around 930–942, the words Cymry and Cymro are used as often as 15 times. However, from the Anglo-Saxon settlement onwards, the people gradually begin to adopt
10147-450: The forests to establish pasture and to cultivate the land, developed new technologies such as ceramics and textile production, and built cromlechs such as Pentre Ifan , Bryn Celli Ddu , and Parc Cwm long cairn between about 5,800 BP and 5,500 BP. Over the following centuries they assimilated immigrants and adopted ideas from Bronze Age and Iron Age Celtic cultures. Some historians, such as John T. Koch , consider Wales in
10286-401: The foundations for stable economic growth had been firmly established in Wales during this period, but this was shown to be optimistic after the recession of the early 1980s saw the collapse of much of the manufacturing base that had been built over the preceding forty years. The Welsh Language Act 1967 repealed a section of the Wales and Berwick Act and thus "Wales" was no longer part of
10425-539: The high standard for which the Ordnance Survey became known. Work was begun in earnest in 1790 under Roy's supervision, when the Board of Ordnance (a predecessor of part of the modern Ministry of Defence ) began a national military survey starting with the south coast of England. Roy's birthplace near Carluke in South Lanarkshire is today marked by a memorial in the form of a large OS trig point . By 1791,
10564-751: The highest court of first instance as well as an appellate court . The three divisions are the Court of Appeal , the High Court of Justice , and the Crown Court . Minor cases are heard by magistrates' courts or the County Court . In 2007 the Wales and Cheshire Region (known as the Wales and Cheshire Circuit before 2005) came to an end when Cheshire was attached to the North-Western England Region. From that point, Wales became
10703-481: The increased diversity of the Welsh economy. Population growth however outpaced economic growth and the standard of living dropped. Prior to the Industrial Revolution in Wales , there were small-scale industries scattered throughout Wales. These ranged from those connected to agriculture, such as milling and the manufacture of woollen textiles , through to mining and quarrying. Agriculture remained
10842-419: The industrial areas were extensive office areas. The complex was notable for its concrete mural. Celestial , by sculptor Keith McCarter and the concrete elliptical paraboloid shell roof over the staff restaurant building. In 1995, the Ordnance Survey digitised the last of about 230,000 maps, making the United Kingdom the first country in the world to complete a programme of large-scale electronic mapping. By
10981-516: The information now being available in the AddressBase products – so as of 2020, MasterMap consists of Topography and Imagery. Pricing of licenses to OS MasterMap data depends on the total area requested, the layers licensed, the number of TOIDs in the layers, and the period in years of the data usage. OS MasterMap can be used to generate maps for a vast array of purposes and maps can be printed from OS MasterMap data with detail equivalent to
11120-587: The intention of recognizing that the River Wye and its traffic belonged to the kingdom of Gwent." However, Fox's interpretations of both the length and purpose of the Dyke have been questioned by more recent research. In 853, the Vikings raided Anglesey , but in 856, Rhodri Mawr defeated and killed their leader, Gorm. The Celtic Britons of Wales made peace with the Vikings and Anarawd ap Rhodri allied with
11259-532: The kingdom of Mercia originally and which came to refer to England as a whole. The Germanic tribes who now dominated these lands were invariably called Saeson , meaning " Saxons ". The Anglo-Saxons called the Romano-British * Walha , meaning 'Romanised foreigner' or 'stranger'. The Welsh continued to call themselves Brythoniaid (Brythons or Britons) well into the Middle Ages , though
11398-463: The language might soon die out. Nationalist sentiment grew following the flooding of the Tryweryn valley in 1965 to create a reservoir to supply water to the English city of Liverpool . Although 35 of the 36 Welsh MPs voted against the bill (one abstained), Parliament passed the bill and the village of Capel Celyn was submerged, highlighting Wales's powerlessness in her own affairs in the face of
11537-419: The language survive after Welsh elites abandoned it in favour of English in the fifteenth and sixteenth centuries. Successive Welsh Language Acts, in 1942, 1967 and 1993 , improved the legal status of Welsh. The Welsh Language (Wales) Measure 2011 modernised the 1993 Welsh Language Act and gave Welsh an official status in Wales for the first time, a major landmark for the language. The Measure also created
11676-583: The large number English people living in Wales. After the Senedd and Elections (Wales) Act 2020 , the National Assembly was renamed " Senedd Cymru " in Welsh and the "Welsh Parliament" in English, which was seen as a better reflection of the body's expanded legislative powers. The Welsh language ( Welsh : Cymraeg ) is an Indo-European language of the Celtic family ; the most closely related languages are Cornish and Breton . Most linguists believe that
11815-438: The late 1990s technological developments had eliminated the need for vast areas for storing maps and for making printing plates by hand. Although there was a small computer section at the Ordnance Survey in the 1960s, the digitising programme had replaced the need for printing large-scale maps, while computer-to-plate technology (in the form of a single machine) had also rendered the photographic platemaking areas obsolete. Part of
11954-400: The latter was converted into a new conference centre in 2000, which was used for internal events and also made available for external organisations to hire. The Ordnance Survey became an Executive Agency in 1990, making the organisation independent of ministerial control. In 1999 the agency was designated a trading fund , required to cover its costs by charging for its products and to remit
12093-507: The law making powers of the National Assembly it is now able to make laws, known as Acts of the Assembly, on all matters in devolved subject areas, without needing the UK Parliament's agreement. In the 2016 referendum , Wales voted in support of leaving the European Union, although demographic differences became evident. According to Danny Dorling , professor of geography at Oxford University, votes for Leave may have been boosted by
12232-432: The leat and the main stream is great enough to provide a useful head of water – several metres (perhaps 5 to 15 feet) for a watermill, or a metre or less (perhaps one to four feet) for the controlled irrigation of a water-meadow . Leats are used to increase the yield of a reservoir by trapping streams in nearby catchments by means of a contour leat. This captures part or all of the stream flow and transports it along
12371-515: The legal definition of England. This essentially defined Wales as a separate entity legally (but within the UK), for the first time since before the Laws in Wales Acts 1535 and 1542 which defined Wales as a part of the Kingdom of England. The Welsh Language Act 1967 also expanded areas where use of Welsh was permitted, including in some legal situations. In a referendum in 1979 , Wales voted against
12510-462: The legal system of England and Wales since 1536. English law is regarded as a common law system, with no major codification of the law and legal precedents are binding as opposed to persuasive. The court system is headed by the Supreme Court of the United Kingdom which is the highest court of appeal in the land for criminal and civil cases. The Senior Courts of England and Wales is
12649-611: The leisure market. In 1920 O. G. S. Crawford was appointed Archaeology Officer and played a prominent role in developing the use of aerial photography to deepen understanding of archaeology. In 1922, devolution in Northern Ireland led to the creation of the Ordnance Survey of Northern Ireland (OSNI) and the independence of the Irish Free State led to the creation of the Ordnance Survey of Ireland , so
12788-594: The male population. Of these, roughly 35,000 were killed, with particularly heavy losses of Welsh forces at Mametz Wood on the Somme and the Battle of Passchendaele . The first quarter of the 20th century also saw a shift in the political landscape of Wales. Since 1865, the Liberal Party had held a parliamentary majority in Wales and, following the general election of 1906 , only one non-Liberal Member of Parliament, Keir Hardie of Merthyr Tydfil , represented
12927-472: The mile) for Land Valuation and Inland Revenue purposes: the increased scale was to provide space for annotations. About a quarter of these 1:1250s were marked "Partially revised 1912/13". In areas where there were no further 1:2500s, these partially revised "fifty inch" sheets represent the last large-scale revision (larger than six-inch) of the County Series. The County Series mapping was superseded by
13066-591: The moor are marked on the 1:50000 and 1:25000 Ordnance Survey maps, such as that serving the now-defunct Vitifer mine near the Warren House Inn . Notable leats include: Wales – in Europe (green & dark grey) – in the United Kingdom (green) Wales ( Welsh : Cymru [ˈkəmrɨ] ) is a country that is part of the United Kingdom . It
13205-480: The name Cymry over Brythoniad . From 800 onwards, a series of dynastic marriages led to Rhodri Mawr 's ( r. 844–77) inheritance of Gwynedd and Powys . His sons founded the three dynasties of Aberffraw for Gwynedd , Dinefwr for Deheubarth and Mathrafal for Powys . Rhodri 's grandson Hywel Dda (r. 900–50) founded Deheubarth out of his maternal and paternal inheritances of Dyfed and Seisyllwg in 930, ousted
13344-476: The necessary materials in suitable combination, and the forested, mountainous countryside was not amenable to industrialisation. Latin became the official language of Wales, though the people continued to speak in Brythonic. While Romanisation was far from complete, the upper classes came to consider themselves Roman, particularly after the ruling of 212 that granted Roman citizenship to all free men throughout
13483-486: The next 20 years, about a third of England and Wales was mapped at the same scale (see Principal Triangulation of Great Britain ) under the direction of William Mudge , as other military matters took precedence. It took until 1823 to re-establish the relationship with the French survey made by Roy in 1787. By 1810, one-inch-to-the-mile maps of most of the south of England were completed, but they were withdrawn from sale between 1811 and 1816 because of security fears. By 1840,
13622-686: The north of England to a scale of 1:2,500. In 1855, the Board of Ordnance was abolished and the Ordnance Survey was placed under the War Office together with the Topographical Survey and the Depot of Military Knowledge. Eventually in 1870 it was transferred to the Office of Works . The primary triangulation of the United Kingdom of Roy, Mudge and Yolland was completed by 1841, but was greatly improved by Alexander Ross Clarke who completed
13761-576: The north. The English words "Wales" and "Welsh" derive from the same Old English root (singular Wealh , plural Wēalas ), a descendant of Proto-Germanic * Walhaz , which was itself derived from the name of the Gauls known to the Romans as Volcae . This term was later used to refer indiscriminately to inhabitants of the Western Roman Empire . Anglo-Saxons came to use
13900-568: The numerical superiority of English MPs in Parliament. Separatist groupings, such as the Free Wales Army and Mudiad Amddiffyn Cymru were formed, conducting campaigns from 1963. Prior to the investiture of Charles in 1969, these groups were responsible for a number of bomb attacks on infrastructure. At a by-election in 1966, Gwynfor Evans won the parliamentary seat of Carmarthen , Plaid Cymru's first Parliamentary seat. By
14039-625: The occupation lasted over 300 years. The campaigns of conquest were opposed by two native tribes: the Silures and the Ordovices . Caractacus or Caradog , leader of the Ordovices, had initial success in resisting Roman invasions of north Wales but was eventually defeated. Roman rule in Wales was a military occupation, save for the southern coastal region of south Wales , where there is a legacy of Romanisation. The only town in Wales founded by
14178-456: The one-inch survey had covered all of Wales and all but the six northernmost counties of England. Surveying was hard work. For instance, Major Thomas Colby , the longest-serving Director General of the Ordnance Survey, walked 586 mi (943 km) in 22 days on a reconnaissance in 1819. In 1824, Colby and most of his staff moved to Ireland to work on a six-inches-to-the-mile (1:10,560) valuation survey. The survey of Ireland, county by county,
14317-407: The ore after crushing by simple machines also driven by water. The Romans also used them for supplying water to the bath-houses or thermae and to drive vertical water-wheels . There are many leats on Dartmoor , mostly constructed to provide power for mining activities, although some were also sources of drinking water. The courses of many Dartmoor leats may still be followed. Many such leats on
14456-476: The organisation to move from a trading fund model to a government-owned limited company , with the move completed in April 2015. The organisation remains fully owned by the UK government and retains many of the features of a public organisation. In September 2015 the history of the Ordnance Survey was the subject of a BBC Four TV documentary entitled A Very British Map: The Ordnance Survey Story . On 10 June 2019
14595-535: The original Ordnance Survey pulled its coverage back to Great Britain. In 1935, the Davidson Committee was established to review the Ordnance Survey's future. The new Director General, Major-General Malcolm MacLeod , started the retriangulation of Great Britain , an immense task involving the erection of concrete triangulation pillars ("trig points") on prominent hilltops as infallible positions for theodolites. Each measurement made by theodolite during
14734-537: The planning of it, there was a degree of consultation with the kings of Powys and Gwent. On the Long Mountain near Trelystan , the dyke veers to the east, leaving the fertile slopes in the hands of the Welsh; near Rhiwabon , it was designed to ensure that Cadell ap Brochwel retained possession of the Fortress of Penygadden." And, for Gwent, Offa had the dyke built "on the eastern crest of the gorge, clearly with
14873-743: The post of Welsh Language Commissioner , replacing the Welsh Language Board. Following the referendum in 2011, the Official Languages Act became the first Welsh law to be created in 600 years, according to the First Minister at the time, Carwyn Jones . This law was passed by Welsh Assembly members (AMs) only and made Welsh an official language of the National Assembly. Starting in the 1960s, many road signs have been replaced by bilingual versions. Various public and private sector bodies have adopted bilingualism to
15012-417: The production of six-inch maps of Ireland was complete. This had led to a demand for similar treatment in England, and work was proceeding on extending the six-inch map to northern England, but only a three-inch scale for most of Scotland. When Colby retired, he recommended William Yolland as his successor, but he was considered too young and the less experienced Lewis Alexander Hall was appointed. After
15151-526: The provision of all local government services. Following devolution in 1997, the Government of Wales Act 1998 created a Welsh devolved assembly, the National Assembly for Wales , with the power to determine how Wales's central government budget is spent and administered. Eight years later, the Government of Wales Act 2006 reformed the National Assembly for Wales and allowed further powers to be granted to it more easily. The Act also created
15290-475: The recognition of the title Prince of Wales from Henry III with the Treaty of Montgomery in 1267. Subsequent disputes, including the imprisonment of Llywelyn 's wife Eleanor , culminated in the first invasion by King Edward I of England . As a result of military defeat, the Treaty of Aberconwy exacted Llywelyn 's fealty to England in 1277. Peace was short-lived, and, with the 1282 Edwardian conquest ,
15429-410: The rest of Europe in preparation for its invasion . Until 1969, the Ordnance Survey largely remained at its Southampton city centre HQ and at temporary buildings in the suburb of Maybush nearby, when a new purpose-built headquarters was opened in Maybush adjacent to the wartime temporary buildings there. Some of the remaining buildings of the original Southampton city-centre site are now used as part of
15568-498: The retriangulation was repeated no fewer than 32 times. The Davidson Committee's final report set the Ordnance Survey on course for the 20th century. The metric national grid reference system was launched and a 1:25000-scale series of maps was introduced. The one-inch maps continued to be produced until the 1970s, when they were superseded by the 1:50000-scale series – as proposed by William Roy more than two centuries earlier. The Ordnance Survey had outgrown its site in
15707-406: The right to set limits on its powers. The Government of Wales Act 2006 (c 32) is an Act of the Parliament of the United Kingdom that reformed the National Assembly for Wales and allows further powers to be granted to it more easily. The Act creates a system of government with a separate executive drawn from and accountable to the legislature. Following a successful referendum in 2011 on extending
15846-399: The rule of the Welsh princes permanently ended. With Llywelyn 's death and his brother prince Dafydd 's execution, the few remaining Welsh lords did homage to Edward I of England . The Statute of Rhuddlan in 1284 provided the constitutional basis for a post-conquest government of the Principality of North Wales from 1284 until 1535/36. It defined Wales as "annexed and united" to
15985-611: The ruler. Other than in the Marches , where March law was imposed by the Marcher Lords, Welsh Law remained in force in Wales until the Statute of Rhuddlan in 1284. Edward I of England annexed the Principality of Wales following the death of Llywelyn ap Gruffudd , and Welsh Law was replaced for criminal cases under the Statute. Marcher Law and Welsh Law (for civil cases) remained in force until Henry VIII of England annexed
16124-521: The six-inch standard was adopted in Great Britain for the un-surveyed northern counties and the 1:1056 scale also began to be adopted for urban surveys. Between 1842 and 1895, some 400 towns were mapped at 1:500 (126 inches), 1:528 (120 inches, "10 foot scale") or 1:1056 (60 inches), with the remaining towns mapped at 1:2500 (~25 inches). In 1855, the Treasury authorised funding for 1:2500 for rural areas and 1:500 for urban areas. The 1:500 scale
16263-482: The source stream often serves to provide a reservoir of water adequate for diversion. The leat then runs along the edge or side of the valley, at a shallower slope than the main stream. The gradient, together with the quality of the wetted surface of the leat, determines the flow rate . The flow rate may be calculated using the Manning formula . By the time it arrives at the water mill the difference in levels between
16402-477: The standard issue, were contoured . The de-classified sheets have now been deposited in some of the Copyright Libraries, helping to complete the map-picture of pre-Second World War Britain. From 1824, the OS began a 6-inch (1:10,560) survey of Ireland for taxation purposes but found this to be inadequate for urban areas and adopted the five-foot scale (1:1056) for Irish cities and towns. From 1840,
16541-551: The story of Cantre'r Gwaelod 's drowning and tales in the Mabinogion , of the waters between Wales and Ireland being narrower and shallower, may be distant folk memories of this time. Neolithic colonists integrated with the indigenous people, gradually changing their lifestyles from a nomadic life of hunting and gathering, to become settled farmers about 6,000 BP – the Neolithic Revolution . They cleared
16680-524: The survey are to endeavour to obtain the correct orthography of the names of places by diligently consulting the best authorities within their reach. The name of each place is to be inserted as it is commonly spelt, in the first column of the name book and the various modes of spelling it used in books, writings &c. are to be inserted in the second column, with the authority placed in the third column opposite to each. Whilst these procedures generally produced excellent results, mistakes were made: for instance,
16819-768: The term to refer to the Britons in particular; the plural form Wēalas evolved into the name for their territory, Wales. Historically in Britain , the words were not restricted to modern Wales or to the Welsh but were used to refer to anything that Anglo-Saxons associated with Britons, including other non-Germanic territories in Britain (e.g. Cornwall ) and places in Anglo-Saxon territory associated with Britons (e.g. Walworth in County Durham and Walton in West Yorkshire). The modern Welsh name for themselves
16958-425: The then Counsel General for Wales , John Griffiths , stated, 'Principality is a misnomer and that Wales should properly be referred to as a country.' In 2011, ISO 3166-2:GB was updated and the term 'principality' was replaced with 'country'. UK Government toponymic guidelines state that, 'though there is a Prince of Wales, this role is deemed to be titular rather than exerting executive authority, and therefore Wales
17097-444: The throne of England from Richard III of England in 1485, uniting England and Wales under one royal house. The last remnants of Celtic-tradition Welsh law were abolished and replaced by English law by the Laws in Wales Acts 1535 and 1542 during the reign of Henry VII's son, Henry VIII . In the legal jurisdiction of England and Wales , Wales became unified with the kingdom of England; the " Principality of Wales " began to refer to
17236-422: The two scales was completed by the 1890s, with a second edition completed in the 1890s and 1900s. From 1907 till the early 1940s, a third edition (or "second revision") was begun but never completed: only areas with significant changes on the ground were revised, many two or three times. Meanwhile, publication of the one-inch to the mile series for Great Britain was completed in 1891. From the late 19th century to
17375-504: The whole country, though it remained a "principality" only in a ceremonial sense. The Marcher lordships were abolished, and Wales began electing members of the Westminster parliament. In 1536 Wales had around 278,000 inhabitants, which increased to around 360,000 by 1620. This was primarily due to rural settlement, where animal farming was central to the Welsh economy. Increase in trade and increased economic stability occurred due to
17514-576: The whole of Wales under the Laws in Wales Acts 1535 and 1542 (often referred to as the Acts of Union of 1536 and 1543), after which English law applied to the whole of Wales. The Wales and Berwick Act 1746 provided that all laws that applied to England would automatically apply to Wales (and the Anglo-Scottish border town of Berwick ) unless the law explicitly stated otherwise; this Act was repealed with regard to Wales in 1967. English law has been
17653-636: Was a key factor in destroying support for the Liberal party in south Wales. The industrial workers of Wales began shifting towards the Labour Party . When in 1908 the Miners' Federation of Great Britain became affiliated to the Labour Party, the four Labour candidates sponsored by miners were all elected as MPs. By 1922, half the Welsh seats at Westminster were held by Labour politicians—the start of
17792-592: Was also a member of the Public Data Group . Paper maps represent only 5% of the company's annual revenue. It produces digital map data, online route planning and sharing services and mobile apps, plus many other location-based products for business, government and consumers. Ordnance Survey mapping is usually classified as either " large-scale " (in other words, more detailed) or "small-scale". The Survey's large-scale mapping comprises 1:2,500 maps for urban areas and 1:10,000 more generally. (The latter superseded
17931-527: Was by then Director General, and he saw how photography could be used to make maps of various scales cheaply and easily. He developed and exploited photozincography , not only to reduce the costs of map production but also to publish facsimiles of nationally important manuscripts. Between 1861 and 1864, a facsimile of the Domesday Book was issued, county by county; and a facsimile of the Gough Map
18070-437: Was compiled during an assembly held at Whitland around 930 by Hywel Dda , king of most of Wales between 942 and his death in 950. The ' law of Hywel Dda ' ( Welsh : Cyfraith Hywel ), as it became known, codified the previously existing folk laws and legal customs that had evolved in Wales over centuries. Welsh Law emphasised the payment of compensation for a crime to the victim, or the victim's kin, rather than punishment by
18209-543: Was completed in 1846. The suspicions and tensions it caused in rural Ireland are the subject of Brian Friel 's play Translations . Colby was not only involved in the design of specialist measuring equipment. He also established a systematic collection of place names, and reorganised the map-making process to produce clear, accurate plans. Place names were recorded in "Name Books", a system first used in Ireland. The instructions for their use were: The persons employed on
18348-457: Was considered more 'rational' than 1:528 and became known as the "sanitary scale" since its primary purpose was to support establishment of mains sewerage and water supply. However, a review of the Ordnance Survey in 1892 found that sales of the 1:500 series maps were very poor and the Treasury declined to fund their continuing maintenance, declaring that any revision or new mapping at this scale must be self-financing. Very few towns and cities saw
18487-442: Was eventually defeated by 1412. Having failed Owain went into hiding and nothing was known of him after 1413. The penal laws against the Welsh of 1401–02 passed by the English parliament made the Welsh second-class citizens. With hopes of independence ended, there were no further wars or rebellions against English colonial rule and the laws remained on the statute books until 1624. Henry Tudor (born in Wales in 1457) seized
18626-577: Was free of glaciers by about 10,250 BP, the warmer climate allowing the area to become heavily wooded. The post-glacial rise in sea level separated Wales and Ireland, forming the Irish Sea . By 8,000 BP the British Peninsula had become an island. By the beginning of the Neolithic ( c. 6,000 BP ) sea levels in the Bristol Channel were still about 33 feet (10 metres) lower than today. The historian John Davies theorised that
18765-436: Was iron smelting, and iron manufacturing became prevalent in both the north and the south of the country. In the north, John Wilkinson 's Ironworks at Bersham was a major centre, while in the south, at Merthyr Tydfil , the ironworks of Dowlais , Cyfarthfa , Plymouth and Penydarren became the most significant hub of iron manufacture in Wales. By the 1820s, south Wales produced 40 per cent of all Britain's pig iron . By
18904-449: Was issued in 1870. From the 1840s, the Ordnance Survey concentrated on the Great Britain " County Series ", modelled on the earlier Ireland survey. A start was made on mapping the whole country, county by county, at six inches to the mile (1:10,560). In 1854, "twenty-five inch" maps were introduced with a scale of 1:2500 (25.344 inches to the mile) and the six inch maps were then based on these twenty-five inch maps. The first edition of
19043-573: Was producing almost 61 million tons of coal. Historian Kenneth Morgan described Wales on the eve of the First World War as a "relatively placid, self-confident and successful nation". The output from the coalfields continued to increase, with the Rhondda Valley recording a peak of 9.6 million tons of coal extracted in 1913. The First World War (1914–1918) saw a total of 272,924 Welshmen under arms, representing 21.5 per cent of
19182-560: Was to map Scotland in the wake of the Jacobite rising of 1745 . There was also a more general and nationwide need in light of the potential threat of invasion during the Napoleonic Wars . Since 1 April 2015, the Ordnance Survey has operated as Ordnance Survey Ltd, a government-owned company , 100% in public ownership. The Ordnance Survey Board remains accountable to the Secretary of State for Science, Innovation and Technology . It
19321-670: Was unusual in that land registration on transfer of title was made compulsory there in 1900. The 1:1056 sheets were partially revised to provide a basis for HM Land Registry index maps and the OS mapped the whole London County Council area (at 1:1056) at national expense. Placenames from the second edition were used in 2016 by the GB1900 project to crowd-source an open-licensed gazetteer of Great Britain. From 1911 onwards – and mainly between 1911 and 1913 – the Ordnance Survey photo-enlarged many 1:2500 sheets covering built-up areas to 1:1250 (50.688 inches to
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