1.
Geographic coordinate system
–
A geographic coordinate system is a coordinate system used in geography that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are chosen such that one of the numbers represents a vertical position. A common choice of coordinates is latitude, longitude and elevation, to specify a location on a two-dimensional map requires a map projection. The invention of a coordinate system is generally credited to Eratosthenes of Cyrene. Ptolemy credited him with the adoption of longitude and latitude. Ptolemys 2nd-century Geography used the prime meridian but measured latitude from the equator instead. Mathematical cartography resumed in Europe following Maximus Planudes recovery of Ptolemys text a little before 1300, in 1884, the United States hosted the International Meridian Conference, attended by representatives from twenty-five nations. Twenty-two of them agreed to adopt the longitude of the Royal Observatory in Greenwich, the Dominican Republic voted against the motion, while France and Brazil abstained. France adopted Greenwich Mean Time in place of local determinations by the Paris Observatory in 1911, the latitude of a point on Earths surface is the angle between the equatorial plane and the straight line that passes through that point and through the center of the Earth. Lines joining points of the same latitude trace circles on the surface of Earth called parallels, as they are parallel to the equator, the north pole is 90° N, the south pole is 90° S. The 0° parallel of latitude is designated the equator, the plane of all geographic coordinate systems. The equator divides the globe into Northern and Southern Hemispheres, the longitude of a point on Earths surface is the angle east or west of a reference meridian to another meridian that passes through that point. All meridians are halves of great ellipses, which converge at the north and south poles, the prime meridian determines the proper Eastern and Western Hemispheres, although maps often divide these hemispheres further west in order to keep the Old World on a single side. The antipodal meridian of Greenwich is both 180°W and 180°E, the combination of these two components specifies the position of any location on the surface of Earth, without consideration of altitude or depth. The grid formed by lines of latitude and longitude is known as a graticule, the origin/zero point of this system is located in the Gulf of Guinea about 625 km south of Tema, Ghana. To completely specify a location of a feature on, in, or above Earth. Earth is not a sphere, but a shape approximating a biaxial ellipsoid. It is nearly spherical, but has an equatorial bulge making the radius at the equator about 0. 3% larger than the radius measured through the poles, the shorter axis approximately coincides with the axis of rotation
2.
Ordnance Survey National Grid
–
The Ordnance Survey National Grid reference system is a system of geographic grid references used in Great Britain, different from using Latitude and Longitude. It is often called British National Grid, the Ordnance Survey devised the national grid reference system, and it is heavily used in their survey data, and in maps based on those surveys. Grid references are commonly quoted in other publications and data sources. The Universal Transverse Mercator coordinate system is used to provide references for worldwide locations. European-wide agencies also use UTM when mapping locations, or may use the Military Grid Reference System system, the grid is based on the OSGB36 datum, and was introduced after the retriangulation of 1936–1962. It replaced the previously used Cassini Grid which, up to the end of World War Two, had issued only to the military. The Airy ellipsoid is a regional best fit for Britain, more modern mapping tends to use the GRS80 ellipsoid used by the GPS, the British maps adopt a Transverse Mercator projection with an origin at 49° N, 2° W. Over the Airy ellipsoid a straight grid, the National Grid, is placed with a new false origin. This false origin is located south-west of the Isles of Scilly, the distortion created between the OS grid and the projection is countered by a scale factor in the longitude to create two lines of longitude with zero distortion rather than one. Grid north and true north are aligned on the 400 km easting of the grid which is 2° W. 2° 0′ 5″ W. OSGB36 was also used by Admiralty nautical charts until 2000 after which WGS84 has been used, a geodetic transformation between OSGB36 and other terrestrial reference systems can become quite tedious if attempted manually. The most common transformation is called the Helmert datum transformation, which results in a typical 7 m error from true, the definitive transformation from ETRS89 that is published by the OSGB is called the National Grid Transformation OSTN02. This models the detailed distortions in the 1936–1962 retriangulation, and achieves backwards compatibility in grid coordinates to sub-metre accuracy, the difference between the coordinates on different datums varies from place to place. The longitude and latitude positions on OSGB36 are the same as for WGS84 at a point in the Atlantic Ocean well to the west of Great Britain. In Cornwall, the WGS84 longitude lines are about 70 metres east of their OSGB36 equivalents, the smallest datum shift is on the west coast of Scotland and the greatest in Kent. But Great Britain has not shrunk by 100+ metres, a point near Lands End now computes to be 27.6 metres closer to a point near Duncansby Head than it did under OSGB36. For the first letter, the grid is divided into squares of size 500 km by 500 km, there are four of these which contain significant land area within Great Britain, S, T, N and H. The O square contains an area of North Yorkshire, almost all of which lies below mean high tide
3.
Saxon Shore
–
The Saxon Shore was a military command of the late Roman Empire, consisting of a series of fortifications on both sides of the English Channel. It was established in the late 3rd century and was led by the Count of the Saxon Shore, in the late 4th century, his functions were limited to Britain, while the fortifications in Gaul were established as separate commands. Several Saxon Shore forts survive in east and south-east England, during the latter half of the 3rd century, the Roman Empire faced a grave crisis. Internally, it was weakened by wars, the violent succession of brief emperors. Most of Britain had been part of the empire since the mid-1st century and it was protected from raids in the north by the Hadrianic and Antonine Walls, while a fleet of some size was also available. However, as the frontiers came under increasing pressure, fortifications were built throughout the Empire in order to protect cities. It is in context that the forts of the Saxon Shore were constructed. Dover was already fortified in the early 2nd century, and the forts in this group were constructed in the period between the 270s and 290s. However, due to the absence of evidence, theories have varied between scholars as to the exact meaning of the name, and also the nature and purpose of the chain of forts it refers to. Two interpretations were put forward as to the meaning of the adjective Saxon, either a shore attacked by Saxons, or a shore settled by Saxons. This view is reinforced by the chain of fortifications across the Channel on the northern coasts of Gaul. Other scholars like John Cotterill however consider the threat posed by Germanic raiders, at least in the 3rd and early 4th centuries and this view, although widely disputed, has found recent support from archaeological evidence at Pevensey, which dates the forts construction to the early 290s. Whatever their original purpose, it is certain that in the late 4th century the forts and their garrisons were employed in operations against Frankish. Britain was abandoned by Rome in 407, with Armorica following soon after, the forts on both sides continued to be inhabited in the following centuries, and in Britain in particular several continued in use well into the Anglo-Saxon period. The nine forts mentioned in the Notitia Dignitatum for Britain are listed here, one of the earliest forts, dated to the 230s. It was built to guard the Wash approaches and is of a typical rectangular castrum layout and it was garrisoned by the Equites Dalmatae Brandodunenses, although evidence exists suggesting that its original garrison was the cohors I Aquitanorum. Established between 260 and the mid-270s to guard the River Yare, it was garrisoned by the Equites Stablesiani Gariannoneses, although there is some discussion as to whether this is actually the fort at Caister-on-Sea, and being on the opposite bank of the same estuary as Burgh Castle. Together with Brancaster one of the earliest forts, built in the 210s to guard the Thames estuary and it was garrisoned by the cohors I Baetasiorum since the 3rd century
4.
Norfolk
–
Norfolk /ˈnɔːrfək/ is a county in East Anglia in England. It borders Lincolnshire to the west and north-west, Cambridgeshire to the west and southwest and its northern and eastern boundaries are the North Sea and, to the north-west, The Wash. With an area of 2,074 square miles and a population of 859,400, of the countys population, 40% live in four major built up areas, Norwich, Great Yarmouth, Kings Lynn and Thetford. The Broads is a network of rivers and lakes in the east of the county, the area is not a National Park although it is marketed as such. It has similar status to a park, and is protected by the Broads Authority. Norfolk was settled in times, with camps along the higher land in the west. A Brythonic tribe, the Iceni, inhabited the county from the 1st century BC to the end of the 1st century AD, the Iceni revolted against the Roman invasion in AD47, and again in 60 led by Boudica. The crushing of the second opened the county to the Romans. During the Roman era roads and ports were constructed throughout the county, situated on the east coast, Norfolk was vulnerable to invasions from Scandinavia and Northern Europe, and forts were built to defend against the Angles and Saxons. Norfolk, Suffolk and several adjacent areas became the kingdom of East Anglia, the influence of the Early English settlers can be seen in the many place names ending in -ton and -ham. Endings such as -by and -thorpe are also common, indicating Danish place names, in the 9th century the region came under attack. In the centuries before the Norman Conquest the wetlands of the east of the county began to be converted to farmland, and settlements grew in these areas. Migration into East Anglia must have high, by the time of the Domesday Book survey it was one of the most densely populated parts of the British Isles. During the high and late Middle Ages the county developed arable agriculture, the economy was in decline by the time of the Black Death, which dramatically reduced the population in 1349. During the English Civil War Norfolk was largely Parliamentarian, the economy and agriculture of the region declined somewhat. During the Industrial Revolution Norfolk developed little industry except in Norwich which was an addition to the railway network. In the 20th century the county developed a role in aviation, during the Second World War agriculture rapidly intensified, and it has remained very intensive since, with the establishment of large fields for growing cereals and oilseed rape. Norfolks low-lying land and easily eroded cliffs, many of which are chalk and clay, make it vulnerable to the sea, the low-lying section of coast between Kelling and Lowestoft Ness in Suffolk is currently managed by the Environment Agency to protect the Broads from sea flooding
5.
England
–
England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west, the Irish Sea lies northwest of England and the Celtic Sea lies to the southwest. England is separated from continental Europe by the North Sea to the east, the country covers five-eighths of the island of Great Britain in its centre and south, and includes over 100 smaller islands such as the Isles of Scilly, and the Isle of Wight. England became a state in the 10th century, and since the Age of Discovery. The Industrial Revolution began in 18th-century England, transforming its society into the worlds first industrialised nation, Englands terrain mostly comprises low hills and plains, especially in central and southern England. However, there are uplands in the north and in the southwest, the capital is London, which is the largest metropolitan area in both the United Kingdom and the European Union. In 1801, Great Britain was united with the Kingdom of Ireland through another Act of Union to become the United Kingdom of Great Britain and Ireland. In 1922 the Irish Free State seceded from the United Kingdom, leading to the latter being renamed the United Kingdom of Great Britain, the name England is derived from the Old English name Englaland, which means land of the Angles. The Angles were one of the Germanic tribes that settled in Great Britain during the Early Middle Ages, the Angles came from the Angeln peninsula in the Bay of Kiel area of the Baltic Sea. The earliest recorded use of the term, as Engla londe, is in the ninth century translation into Old English of Bedes Ecclesiastical History of the English People. According to the Oxford English Dictionary, its spelling was first used in 1538. The earliest attested reference to the Angles occurs in the 1st-century work by Tacitus, Germania, the etymology of the tribal name itself is disputed by scholars, it has been suggested that it derives from the shape of the Angeln peninsula, an angular shape. An alternative name for England is Albion, the name Albion originally referred to the entire island of Great Britain. The nominally earliest record of the name appears in the Aristotelian Corpus, specifically the 4th century BC De Mundo, in it are two very large islands called Britannia, these are Albion and Ierne. But modern scholarly consensus ascribes De Mundo not to Aristotle but to Pseudo-Aristotle, the word Albion or insula Albionum has two possible origins. Albion is now applied to England in a poetic capacity. Another romantic name for England is Loegria, related to the Welsh word for England, Lloegr, the earliest known evidence of human presence in the area now known as England was that of Homo antecessor, dating to approximately 780,000 years ago. The oldest proto-human bones discovered in England date from 500,000 years ago, Modern humans are known to have inhabited the area during the Upper Paleolithic period, though permanent settlements were only established within the last 6,000 years
6.
Notitia Dignitatum
–
The Notitia Dignitatum is a document of the late Roman Empire that details the administrative organization of the Eastern and Western Empires. It is unique as one of few surviving documents of Roman government and describes several thousand offices from the imperial court to provincial governments, diplomatic missions. It is usually considered to be accurate for the Western Roman Empire in the AD 420s, however, the text does not date its own authorship or accuracy, and omissions complicate ascertaining its date from its content. There are several extant 15th- and 16th-century copies of the document, the heraldry in illuminated manuscript copies of the Notitia is thought to copy or imitate only that illustrated in the lost Codex Spirensis. The iteration of 1542 made for Otto Henry, Elector Palatine, was revised with illustrations more faithful to the originals added at a later date, the most important copy of the Codex is that made for Pietro Donato in 1436 and illuminated by Peronet Lamy. The Notitia presents four primary problems as regards the study of the Empires military, therefore, its development from the structure of the Principate is largely conjectural because of the lack of other evidence. It was compiled at two different times, the section for the Eastern Empire apparently dates from circa AD395 and that for the Western Empire from circa AD420. Further, each section is not a contemporaneous snapshot. The Eastern section may contain data from as early as AD379, the Western section contains data from as early as circa AD400, for example, it shows units deployed in Britannia, which must date from before 410, when the Empire lost government of the island. In consequence, there is substantial duplication, with the unit often listed under different commands. It is impossible to ascertain whether these were detachments of the unit in different places simultaneously. Also, it is likely that some units were merely nominal or minimally staffed, the Notitia has many sections missing and lacunae within sections. This is doubtless due to accumulated textual losses and copying errors, because it was copied over the centuries. The Notitia cannot therefore provide a comprehensive list of all units that existed, the Notitia does not record the number of personnel. Given that and the paucity of evidence of unit sizes at that time, the size of individual units. In turn, this makes it impossible to assess accurately the total size of the army, for example, the forces deployed in Britain circa AD400 may have been merely 18,000 against circa 55,000 in the AD 2nd century. The Notitia contains symbols similar to the diagram which later came to be known as yin, the emblem of the Thebaei, another Western Roman infantry regiment, featured a pattern of concentric circles comparable to its static version. The Roman patterns predate the earliest Taoist versions by almost seven hundred years, laeti Tabula Peutingeriana List of Late Roman provinces Notitia Dignitatum, edited by Robert Ireland, in British Archaeological Reports, International Series 63.2
7.
Saxons
–
The Saxons were a group of Germanic tribes first mentioned as living near the North Sea coast of what is now Germany, in the late Roman empire. They were soon mentioned as raiding and settling in many North Sea areas, as well as pushing south inland towards the Franks. Significant numbers settled in parts of Great Britain in the early Middle Ages. Many Saxons however remained in Germania, where they resisted the expanding Frankish Empire through the leadership of the semi-legendary Saxon hero, the Saxons earliest area of settlement is believed to have been Northern Albingia, an area approximately that of modern Holstein. This general area also included the probable homeland of the Angles, Saxons, along with the Angles and other continental Germanic tribes, participated in the Anglo-Saxon settlement of Britain during and after the 5th century. The British-Celtic inhabitants of the isles tended to refer to all of these collectively as Saxons. It is unknown how many Saxons migrated from the Continent to Britain, the Saxons may have derived their name from seax, a kind of knife for which they were known. The seax has a symbolic impact in the English counties of Essex and Middlesex. Their names, along with those of Sussex and Wessex, contain a remnant of the word Saxon. The Elizabethan era play Edmund Ironside suggests the Saxon name derives from the Latin saxa, Their names discover what their natures are, More hard than stones, in the Celtic languages, the words designating English nationality derive from the Latin word Saxones. The most prominent example, a loanword in English, is the Scottish Gaelic Sassenach and it derives from the Scottish Gaelic Sasunnach meaning, originally, Saxon, from the Latin Saxones. Scots- or Scottish English-speakers in the 21st century usually use it as a term for an English person. The Oxford English Dictionary gives 1771 as the date of the earliest written use of the word in English. Sasanach, the Irish word for an Englishman, has the same derivation, as do the words used in Welsh to describe the English people, Cornish terms the English Sawsnek, from the same derivation. In the 16th century Cornish-speakers used the phrase Meea navidna cowza sawzneck to feign ignorance of the English language, England in Scottish Gaelic is Sasainn. Other examples include the Welsh Saesneg, Irish Sasana, Breton saoz, and Cornish Sowson, Sowsnek, the label Saxons was also applied to German settlers who migrated during the 13th century to southeastern Transylvania. From Transylvania, some Saxons migrated to neighbouring Moldavia, as the name of the town, Sas-cut, sascut is located in the part of Moldavia that is today part of Romania. The Finns and Estonians have changed their usage of the term Saxony over the centuries to denote now the country of Germany
8.
Burgh Castle Roman Site
–
This fort was possibly known as Gariannonum, although the single record that describes it as such may also mean the Roman site at Caister-on-Sea. Between the mid-7th and 9th centuries the site was occupied by a monastic settlement. In Roman times, possibly known as Gariannonum, name that appears in a source, the Notitia Dignitatum. The identification was once thought secure, but is now thought doubtful by specialists, Burgh, is derived from the same Old English language word burh. The Old English word was used for a fortified town or proto-castle, as in Burgh Castle. The fort is rectangular measuring approximately 205 m by 100 m. The walls on the north, east, and much of the side are largely intact, standing at a height of approximately 4.6 m. They have a core of mortared flint rubble and an external and internal facing of prepared flint and red tile or brick in alternating bands. The west wall has at time in the distant past collapsed down the underlying hillside and into what was once an estuary but is now a marsh. Breydon Water is all that is left of the estuary this fort once overlooked, historians find many arguments against this location, but are unable to agree on a better one. A cluster of oval huts towards the north-east angle of the fort may be interpreted as cells or workshops, coins and Ipswich ware carry the occupation well into the 8th and possibly 9th century. However a detailed report by Stephen Johnson of Norfolk Museums Service in 1983 concluded that there was no evidence for any monastic settlement in Burgh Castle itself. In the 11th and 12th centuries a motte was constructed in the south-west corner, the motte was partly removed in around 1770, in 1839 it was completely levelled. The ditch was in-filled in the same year, Archaeological excavations identified a timber tower on the motte, with the bailey, of the castle located to the northeast of the motte. The fort lies close to the church of Burgh Castle St Peter and St Paul. In the 17th century, Sir Henry Spelman recorded a tradition that the fort had been occupied by Jews, and reported the name of a track leading away from it as Jews Way. This is likely to reflect a sense of the site having been the home of an ancient but enigmatic people. The site is located to the west of the village and civil parish of Burgh Castle and it is located on the eastern bank of the southernmost part of Breydon Water, formed at the mouths of the Rivers Ant, Bure, Yare, and Waveney
9.
Caister Roman Site
–
Caister Roman Site is a Roman Saxon Shore fort, located in Caister-on-Sea, Norfolk. It was constructed around AD200 for a unit of the Roman army and navy and this fort was possibly known as Gariannonum, although the single record that describes it as such may also mean the Roman site at Burgh Castle. The fort was originally 3.5 ha in size and roughly square in shape, with large stone perimeter walls 4 to 5 m high, earth ramparts and ditches of 175 m in length on all four sides. In around AD260 a fort at Burgh Castle was constructed on the side of the estuary. The remainder of the site, approximately 3.15 ha now lies under modern housing. On the southern side is a wall which could be part of a portico. The second room from the west contains an example of a Hypocaust heated floor, on the north side of the building is a corridor running along the southern and south eastern sides of a rectangular courtyard beyond. It is likely that the building was in use during the third and fourth centuries AD and likely to have served various domestic. There is evidence that the building was damaged by fire in the later fourth century. Within the courtyard area are parts of other possibly earlier buildings, which include for various structures and the remains of a corn-drying kiln and a water tank. Following the Roman occupation, the site remained unoccupied until the Middle and Late Saxon periods, to the south of the fort a large Saxon cemetery has been excavated. Today the remains of the fort are opened free of charge to the public by English Heritage, the site is located on the western edge of the town of Caister-on-Sea, in the county of Norfolk. At the time of its construction, the site of the fort would have been on the side of an estuary, at the mouths of the Rivers Ant, Bure, Yare. Today however, the extension of the Yarmouth sandbank has meant that this shore fort now lies some distance inland. The Roman Shore Fort site of Burgh Castle lies a few miles to the southwest
10.
Breydon Water
–
Breydon Water is a large stretch of sheltered estuary at Great Yarmouth in the English county of Norfolk. It is at the gateway to The Broads river system on the edge of Halvergate Marshes. It is the UKs largest protected wetland and it is 5 km long and more than 1.5 km wide in places. Breydon Water is overlooked at the end by the remains of the Roman fort at Burgh Castle. Centuries ago, Breydon Water would have one large estuary facing the sea. At the western end the water may be considered to start at the confluence of the River Yare and River Waveney, safe passage for boats is indicated by red and green marker posts. Unlike most of the waterways in the Norfolk Broads, Breydon Water is not subject to a speed limit. Breydon Water is a biological Site of Special Scientific Interest and a Local Nature Reserve, at low tide there are vast areas of mudflats and saltings, all teeming with birds. Since the mid-80s, Breydon Water has been a reserve in the care of the Royal Society for the Protection of Birds. It has been a shooting area for centuries, and the shooting continues. In terms of conservation, Breydon Water is one of the most important estuaries on the east coast of England between The Wash and the Thames estuary. It has specially protected status by virtue of being a European Union Special Protection Area. In the winter, large numbers of wading birds and wildfowl use it to overwinter, including 12,000 golden plovers,12,000 wigeons,32,000 lapwings and tens of thousands of Bewicks swans. Other species that have noted there include dunlin, sanderling, whimbrel, several flamingos, avocets. There is an observation hide at the east end of Breydon Water, on the north shore. Other breeding species include shelduck, shovelers, oystercatchers and yellow wagtails, the naturalist Arthur Henry Patterson A. L. S. Breydon Water is the site of events in the popular Swallows and Amazons series book, Norfolk Broads Breydon Water Literary Links RSPB Berney Marshes and Breydon Water Wherrymans Way long distance walk
Burgh Castle shown within Norfolk