1.
Geographic coordinate system
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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.
Ill (France)
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The Ill is a river in Alsace, in north-eastern France. It is a bank, or western tributary of the Rhine. As the Ill nears the city of Mulhouse, most of its flow is diverted into a channel leading to the Doller. One of these channels is the Canal du Faux-Rempart that, together with the channel of the Ill. The Ill is currently navigable from a junction with the Canal de la Marne au Rhin for a distance of just under 10 kilometres upstream to a head of navigation at Nachtweid. This stretch of river passes through the centre of Strasbourg, and makes connection with the Canal du Faux-Rempart, the Canal du Rhone au Rhine, there is a single lock, in the Petite France quarter of central Strasbourg. Passenger trip boats use this section in the direction, completing their loop via the Canal du Faux-Rempart that is closed to all other traffic. Http, //www. geoportail. fr The Ill at the Sandre database
3.
Strasbourg
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Strasbourg is the capital and largest city of the Grand Est region of France and is the official seat of the European Parliament. Located close to the border with Germany in the region of Alsace. In 2014, the city proper had 276,170 inhabitants, Strasbourgs metropolitan area had a population of 773,347 in 2013, making it the ninth largest metro area in France and home to 13% of the Grand Est regions inhabitants. The transnational Eurodistrict Strasbourg-Ortenau had a population of 915,000 inhabitants in 2014, Strasbourg is the seat of several European institutions, such as the Council of Europe and the Eurocorps, as well as the European Parliament and the European Ombudsman of the European Union. The city is also the seat of the Central Commission for Navigation on the Rhine, Strasbourgs historic city centre, the Grande Île, was classified a World Heritage site by UNESCO in 1988, the first time such an honour was placed on an entire city centre. The largest Islamic place of worship in France, the Strasbourg Grand Mosque, was inaugurated by French Interior Minister Manuel Valls on 27 September 2012. Economically, Strasbourg is an important centre of manufacturing and engineering, as well as a hub of road, rail, the port of Strasbourg is the second largest on the Rhine after Duisburg, Germany. Before the 5th century, the city was known as Argantorati, a Celtic Gaulish name Latinized first as Argentorate, after the 5h century, the city became known by a completely different name Gallicized as Strasbourg. That name is of Germanic origin and means Town of roads, Strasbourg is situated on the eastern border of France with Germany. This border is formed by the River Rhine, which forms the eastern border of the modern city. The historic core of Strasbourg however lies on the Grande Île in the River Ill, which flows parallel to, and roughly 4 kilometres from. The natural courses of the two eventually join some distance downstream of Strasbourg, although several artificial waterways now connect them within the city. This section of the Rhine valley is an axis of north-south travel, with river traffic on the Rhine itself. The city is some 400 kilometres east of Paris, in spite of its position far inland, Strasbourgs climate is classified as Oceanic, with warm, relatively sunny summers and cold, overcast winters. Precipitation is elevated from mid-spring to the end of summer, but remains largely constant throughout the year, on average, snow falls 30 days per year. The highest temperature recorded was 38.5 °C in August 2003. The lowest temperature recorded was −23.4 °C in December 1938. Nonetheless, the disappearance of heavy industry on both banks of the Rhine, as well as effective measures of traffic regulation in and around the city have reduced air pollution
4.
France
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France, officially the French Republic, is a country with territory in western Europe and several overseas regions and territories. The European, or metropolitan, area of France extends from the Mediterranean Sea to the English Channel and the North Sea, Overseas France include French Guiana on the South American continent and several island territories in the Atlantic, Pacific and Indian oceans. France spans 643,801 square kilometres and had a population of almost 67 million people as of January 2017. It is a unitary republic with the capital in Paris. Other major urban centres include Marseille, Lyon, Lille, Nice, Toulouse, during the Iron Age, what is now metropolitan France was inhabited by the Gauls, a Celtic people. The area was annexed in 51 BC by Rome, which held Gaul until 486, France emerged as a major European power in the Late Middle Ages, with its victory in the Hundred Years War strengthening state-building and political centralisation. During the Renaissance, French culture flourished and a colonial empire was established. The 16th century was dominated by civil wars between Catholics and Protestants. France became Europes dominant cultural, political, and military power under Louis XIV, in the 19th century Napoleon took power and established the First French Empire, whose subsequent Napoleonic Wars shaped the course of continental Europe. Following the collapse of the Empire, France endured a succession of governments culminating with the establishment of the French Third Republic in 1870. Following liberation in 1944, a Fourth Republic was established and later dissolved in the course of the Algerian War, the Fifth Republic, led by Charles de Gaulle, was formed in 1958 and remains to this day. Algeria and nearly all the colonies became independent in the 1960s with minimal controversy and typically retained close economic. France has long been a centre of art, science. It hosts Europes fourth-largest number of cultural UNESCO World Heritage Sites and receives around 83 million foreign tourists annually, France is a developed country with the worlds sixth-largest economy by nominal GDP and ninth-largest by purchasing power parity. In terms of household wealth, it ranks fourth in the world. France performs well in international rankings of education, health care, life expectancy, France remains a great power in the world, being one of the five permanent members of the United Nations Security Council with the power to veto and an official nuclear-weapon state. It is a member state of the European Union and the Eurozone. It is also a member of the Group of 7, North Atlantic Treaty Organization, Organisation for Economic Co-operation and Development, the World Trade Organization, originally applied to the whole Frankish Empire, the name France comes from the Latin Francia, or country of the Franks
5.
Bridge
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A bridge is a structure built to span physical obstacles without closing the way underneath such as a body of water, valley, or road, for the purpose of providing passage over the obstacle. There are many different designs that each serve a particular purpose, the Oxford English Dictionary traces the origin of the word bridge to an Old English word brycg, of the same meaning. The word can be traced back to Proto-Indo-European *bʰrēw-. The word for the game of the same name has a different origin. The first bridges made by humans were probably spans of cut wooden logs or planks and eventually stones, using a simple support, some early Americans used trees or bamboo poles to cross small caverns or wells to get from one place to another. Dating to the Greek Bronze Age, it is one of the oldest arch bridges still in existence, several intact arched stone bridges from the Hellenistic era can be found in the Peloponnese. The greatest bridge builders of antiquity were the ancient Romans, the Romans built arch bridges and aqueducts that could stand in conditions that would damage or destroy earlier designs. An example is the Alcántara Bridge, built over the river Tagus, the Romans also used cement, which reduced the variation of strength found in natural stone. One type of cement, called pozzolana, consisted of water, lime, sand, brick and mortar bridges were built after the Roman era, as the technology for cement was lost. In India, the Arthashastra treatise by Kautilya mentions the construction of dams, a Mauryan bridge near Girnar was surveyed by James Princep. The bridge was swept away during a flood, and later repaired by Puspagupta, the use of stronger bridges using plaited bamboo and iron chain was visible in India by about the 4th century. A number of bridges, both for military and commercial purposes, were constructed by the Mughal administration in India and this bridge is also historically significant as it is the worlds oldest open-spandrel stone segmental arch bridge. European segmental arch bridges date back to at least the Alconétar Bridge, rope bridges, a simple type of suspension bridge, were used by the Inca civilization in the Andes mountains of South America, just prior to European colonization in the 16th century. During the 18th century there were innovations in the design of timber bridges by Hans Ulrich Grubenmann, Johannes Grubenmann. The first book on bridge engineering was written by Hubert Gautier in 1716, a major breakthrough in bridge technology came with the erection of the Iron Bridge in Shropshire, England in 1779. It used cast iron for the first time as arches to cross the river Severn, with the Industrial Revolution in the 19th century, truss systems of wrought iron were developed for larger bridges, but iron does not have the tensile strength to support large loads. With the advent of steel, which has a tensile strength, much larger bridges were built. In 1927 welding pioneer Stefan Bryła designed the first welded bridge in the world
6.
Weir
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A weir /ˈwɪər/ is a barrier across the horizontal width of the river that alters the flow characteristics of the water and usually results in a change in the vertical height of the river level. There are many designs of weir, but commonly water flows freely over the top of the weir crest before cascading down to a lower level, Weirs are commonly used to prevent flooding, measure discharge and help render rivers navigable. In some locations the terms dam and weir are synonymous, a dam is usually specifically designed to impound water behind a wall, whilst a weir is designed to alter the river flow characteristics. A common distinction between dams and weirs is that flows over the top of a weir or underneath it for at least some of its length. Accordingly the crest of a spillway on a large dam may therefore be referred to as a weir. Weirs can vary in size both horizontally and vertically, with the smallest being only a few inches in height whilst the largest may be hundreds of metres long, some common weir purposes are outlined below. Weirs allow hydrologists and engineers a method of measuring the volumetric flow rate in small to medium-sized streams/rivers or in industrial discharge locations. Since the geometry of the top of the weir is known and all flows over the weir. However, this can only be achieved in locations where all water flows over the top of the weir crest, if these conditions are not met it can make flow measurement complicated, inaccurate or even impossible. The discharge calculation can be summarised as, Q = C L H n Where Q is flow rate of fluid C is the flow coefficent for the structure, Flow measurement weirs must be well maintained if they are to remain accurate. As weirs are a physical barrier they can impede the movement of fish and other animals up. This can have an effect of fish species that migrate as part of their breeding cycle. For example, weirs in the Great Lakes region have helped to prevent invasive Sea lamprey from colonising further upstream, mill ponds are created by a weir impounding water that then flows over the structure. The energy created by the change in height of the water can then be used to power waterwheels and power mill, Weirs are commonly used to control the flow rates of rivers during periods of high discharge. Sluice gates can be altered to increase or decrease the volume of flowing downstream. Weirs of this purpose are commonly found upstream of towns and villages, by slowing the rate at which water moves downstream even slightly a disproportionate effect can be had on the likelihood of flooding. On larger rivers a weir can also alter the characteristics of a river to the point that vessels are able to navigate areas previously inaccessible due to extreme currents or eddies. Many larger weirs will have built in that allow boats and river users to shoot the weir
7.
Lock (water navigation)
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A lock is a device used for raising and lowering boats, ships and other watercraft between stretches of water of different levels on river and canal waterways. Locks are used to make a more easily navigable, or to allow a canal to cross land that is not level. Later canals used more and larger locks to allow a direct route to be taken. Since 2016 the largest lock worldwide is the Kieldrecht Lock in the Port of Antwerp, a pound lock is a type of lock that is used almost exclusively nowadays on canals and rivers. A pound lock has a chamber with gates at both ends that control the level of water in the pound, in contrast, an earlier design with a single gate was known as a flash lock. Pound locks were first used in medieval China during the Song Dynasty, having been pioneered by the government official and engineer Qiao Weiyue in 984. The gates were hanging gates, when they were closed the water accumulated like a tide until the level was reached. The water level could differ by 4 feet or 5 feet at each lock, in medieval Europe a sort of pound lock was built in 1373 at Vreeswijk, Netherlands. This pound lock serviced many ships at once in a large basin, yet the first true pound lock was built in 1396 at Damme near Bruges, Belgium. A famous civil engineer of pound locks in Europe was the Italian Bertola da Novate, who constructed 18 of them on the Naviglio di Bereguardo between the years 1452 and 1458. When a stretch of river is navigable, a lock is sometimes required to bypass an obstruction such as a rapid, dam. In large scale river navigation improvements, weirs and locks are used together, a river improved by these means is often called a Waterway or River Navigation. Sometimes a river is made entirely non-tidal by constructing a sea lock directly into the estuary, in more advanced river navigations, more locks are required. Where a longer cut bypasses a stretch of river, the upstream end of the cut will often be protected by a flood lock. The longer the cut, the greater the difference in level between start and end of the cut, so that a very long cut will need additional locks along its length. At this point, the cut is, in effect, a canal, Early completely artificial canals, across fairly flat countryside, would get round a small hill or depression by simply detouring around it. However, locks continued to be built to supplement these solutions, all pound locks have three elements, A watertight chamber connecting the upper and lower canals, and large enough to enclose one or more boats. The position of the chamber is fixed, but its level can vary
8.
Petite France, Strasbourg
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Petite France is a historic quarter of the city of Strasbourg in eastern France. It is located at the end of the Grande Île. Petite France forms part of the UNESCO World Heritage Site of Grande Île, just upstream of Petite France, the River Ill flows through the Barrage Vauban, a defensive structure built at the end of the 17th century. These four channels are spanned by the Ponts Couverts, a defensive structure of three bridges and four towers that, despite its name, has not been covered since the 18th century. The sloping roofs of many of the buildings include open lofts where hides were once dried, three of the four channels flowing through the quarter run over weirs that once drove mills and other industries, whilst the northernmost channel is navigable. This passes through a lock and the Pont du Faisan swing bridge in the centre of the quarter, on the north bank of the Ill at the heart of the quarter is the Maison des Tanneurs, home of the Tanners Guild, and Place Benjamin-Zix. From this square lead several streets, including the Rue du Bain-aux-Plantes, the name Petite-France was not given for patriotic or architectural reasons. It comes from the hospice of the syphilitic, which was built in the fifteenth century on this island, to cure persons with syphilis
9.
Monument historique
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The term monument historique is a designation given to some national heritage sites in France. Both public and privately owned structures may be listed in this way, as of 2012 there were 44,236 monuments listed. Buildings may be given the classification for both their exteriors or interiors, including a buildings décor, its furniture, a single room, or even a staircase. An example is the Monument Historique classification of the décor in the café Deux Garçons in Aix-en-Provence whose patrons once included Alphonse de Lamartine, Émile Zola, since the 1990s, a significant number of places have been given the designation because of their historical importance to science. The MH designation traces its roots to the French Revolution when the government appointed Alexandre Lenoir to specify, though the first classifications were given in the 19th century by the writer Prosper Mérimée, inspector-general of historical monuments, by a first list established in 1840. In 1851, Mérimée organized the Missions Héliographiques to document Frances medieval architecture, a monument historique may be marked by the official logo of the Union REMPART, a French historical restoration association. It consists of a representing the labyrinth that used to be in Reims Cathedral. Use of the logo is optional and these two levels of protection are determined after a thorough historical study by the préfet for the région, or by the Minister of Culture for the national level. They are aided by the advice of a commission named Commission régionale du patrimoine et des sites, many of the Châteaux of the Loire Valley carry the MH designation as do the renowned gardens at Château de Villandry. Prosper Mérimée 1803-1870 The monuments historiques inspector Prosper Mérimée established the first list of monuments classés in 1840, rules and regulations on monuments historiques Monumental parks and monuments historiques in need of work Les Monuments Historiques de la France, bulletin trimestriel. Paris, Caisse Nationale des Monuments Historiques
