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35-1119: Coordinates : 5°18′25.2″S 37°53′34.8″E / 5.307000°S 37.893000°E / -5.307000; 37.893000 River in Tanga Region, Tanzania Saunyi River [REDACTED] Native name Mto Saunyi ( Swahili ) Location Country [REDACTED] Tanzania Region Manyara Region & Tanga Region District Kilindi District , Handeni District , Kiteto District & Korogwe District Ward Mkindi , Saunyi, Misima, Ruvu Remiti & Mkalamo Physical characteristics Source • location Mkindi , Kilindi District • coordinates 5°18′25.2″S 37°53′34.8″E / 5.307000°S 37.893000°E / -5.307000; 37.893000 Basin features River system Pangani River Saunyi River ( Mto Saunyi in Swahili )
70-505: A tan ϕ {\displaystyle \textstyle {\tan \beta ={\frac {b}{a}}\tan \phi }\,\!} ; for the GRS 80 and WGS 84 spheroids, b a = 0.99664719 {\textstyle {\tfrac {b}{a}}=0.99664719} . ( β {\displaystyle \textstyle {\beta }\,\!} is known as the reduced (or parametric) latitude ). Aside from rounding, this
105-460: A datum transformation such as a Helmert transformation , although in certain situations a simple translation may be sufficient. Datums may be global, meaning that they represent the whole Earth, or they may be local, meaning that they represent an ellipsoid best-fit to only a portion of the Earth. Examples of global datums include World Geodetic System (WGS 84, also known as EPSG:4326 ),
140-778: A confluence with the Ruvubu River . The waters of the Kagera are thus provided by two major tributaries, the Nyabarongo of Rwanda, which feeds Lake Rweru, and the Ruvubu of Burundi. It is unknown which of these two feeder rivers is the longer and hence the ultimate source of the Nile. From the confluence, the Kagera flows north along the Rwanda-Tanzania border, over Rusumo Falls and through Akagera National Park . It then takes
175-468: A coordinate tuple like a cartesian coordinate system , the geographic coordinate system is not cartesian because the measurements are angles and are not on a planar surface. A full GCS specification, such as those listed in the EPSG and ISO 19111 standards, also includes a choice of geodetic datum (including an Earth ellipsoid ), as different datums will yield different latitude and longitude values for
210-608: A point on Earth's 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 (often called great circles ), which converge at the North and South Poles. The meridian of the British Royal Observatory in Greenwich , in southeast London, England, is the international prime meridian , although some organizations—such as
245-473: A region of the surface of the Earth. Some newer datums are bound to the center of mass of the Earth. This combination of mathematical model and physical binding mean that anyone using the same datum will obtain the same location measurement for the same physical location. However, two different datums will usually yield different location measurements for the same physical location, which may appear to differ by as much as several hundred meters; this not because
280-651: A turn to the east, following the Tanzania- Uganda border and emptying into Lake Victoria in Uganda. In 1898, Richard Kandt was the first European to reach the source of the Kagera. The river has featured prominently in the histories of the countries it runs through, particularly Rwanda. In 1894, German Gustav Adolf von Götzen crossed the Kagera at Rusumo Falls, marking the Rwandan colonial era that officially started in 1899. And in 1916, during World War I ,
315-581: A year (about 28 per cent of the lake's outflow ). The Kagera is formed by the confluence of the Ruvuvu and the Nyabarongo , close to the northernmost point of Lake Tanganyika . It forms parts of the Burundi– Tanzania , Rwanda –Tanzania, Burundi–Rwanda, and Tanzania– Uganda borders. It lends its name to Akagera National Park in northern Rwanda, as well as to the Kagera Region of Tanzania. On
350-411: Is 6,367,449 m . Since the Earth is an oblate spheroid , not spherical, that result can be off by several tenths of a percent; a better approximation of a longitudinal degree at latitude ϕ {\displaystyle \phi } is where Earth's equatorial radius a {\displaystyle a} equals 6,378,137 m and tan β = b
385-480: Is 110.6 km. The circles of longitude, meridians, meet at the geographical poles, with the west–east width of a second naturally decreasing as latitude increases. On the Equator at sea level, one longitudinal second measures 30.92 m, a longitudinal minute is 1855 m and a longitudinal degree is 111.3 km. At 30° a longitudinal second is 26.76 m, at Greenwich (51°28′38″N) 19.22 m, and at 60° it
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#1732798529688420-522: Is 15.42 m. On the WGS 84 spheroid, the length in meters of a degree of latitude at latitude ϕ (that is, the number of meters you would have to travel along a north–south line to move 1 degree in latitude, when at latitude ϕ ), is about The returned measure of meters per degree latitude varies continuously with latitude. Similarly, the length in meters of a degree of longitude can be calculated as (Those coefficients can be improved, but as they stand
455-673: Is an East African river, forming part of the upper headwaters of the Nile and carrying water from its most distant source. With a total length of 597 km (371 mi) from its source located in Lake Rweru in Rwanda. The section of river named Kagera begins in Burundi , flowing out from Lake Rweru . From the lake, it flows east along the Rwanda -Burundi and Rwanda- Tanzania borders to
490-456: Is known as a graticule . The origin/zero point of this system is located in the Gulf of Guinea about 625 km (390 mi) south of Tema , Ghana , a location often facetiously called Null Island . In order to use the theoretical definitions of latitude, longitude, and height to precisely measure actual locations on the physical earth, a geodetic datum must be used. A horizonal datum
525-6110: Is located in the western Tanga Region and southern Manyara Region of Tanzania . It begins in Mkindi ward in Kilindi District of Tanga Region and eventually drains into Pangani River at Mkalamo ward in Korogwe District . References [ edit ] ^ "Saunyi River" . Retrieved 2023-05-11 . ^ Ibrahim, Barbara, and Fouad Ibrahim N. “Pastoralists in Transition - A Case Study from Lengijape, Maasai Steppe.” GeoJournal, vol. 36, no. 1, 1995, pp. 27–48. JSTOR, http://www.jstor.org/stable/41146468 . Accessed 11 May 2023. ^ Mungâ, Henry G., Milline J. Mbonile, and Faustin P. Maganga. "Innovative pathways for enhancing climate change and variability resilience among agro-pastoral communities in semi-arid areas of Kiteto and Kilindi Districts, Tanzania." African Journal of Environmental Science and Technology 13.5 (2019): 201-219. v t e Rivers of Tanzania Rivers Ambala Bangala Gombe Great Ruaha Kafufu Kagera Kalambo Luhumuka Lujenda Lukuledi Lumi Lumpungu Magamba Malagarasi Manonga Mara Matandu Mbezi Mbwemkuru Mkulumuzi Mkuzu Moyowosi Mpiji Msangazi Myakaliza Nguya Pangani Ruchugi Rufiji Rurubu Ruvu Ruvuma Ruvyironza Semu Sibiti Simiyu Tarangire Ugalla Umba Wami Wembere Zigi Cheli Mwaru v t e Kilindi District Capital: Songe Wards Jaila Kibirashi Kikunde Kilindi Kilwa Kimbe Kisangasa Kwediboma Kwekivu Lwande Mabalanga Masagalu Mkindi Msanja Mafisa Bokwa Negero Pagwi Saunyi Songe Tunguli Ethnic Groups Ngulu Zigula v t e Handeni District Capital: Mkata Wards Kabuku Kabuku Ndani Kang'ata Pongwe Pogwe Kiva Komkonga Kwachaga Kwaluguru Kwamatuku Kwamgwe Kwamkonje Kwamsisi Kwasunga Kwedizinga Mazingara Mgambo Misima Mkata Ndolwa Segera Sindeni Native Peoples Zigua Rivers and Lakes Mligasi River Major Cities and Towns Mkata Handeni Segera National Parks and Reserves Handeni National Forest Reserve Gole Forest Reserve Kitumbi Forest Reserve v t e Korogwe District Capital: Korogwe Wards Bungu Chekelei Dindira Kizara Kerenge Kizara Kwagunda Kwashemshi Lutindi Magamba Kwalukonge Magoma Makuyuni Mashewa Mazinde Mkalamo Mkomazi Mombo Mpale Mswaha Vugiri Native Peoples Shambaa Rivers and Lakes Lwengera River Pangani River Major Cities and Towns Mombo Makuyuni, Korogwe National Parks and Forest Reserves Amani Nature Reserve Nilo Forest Reserve Korogwe Landmarks Mafi peak Mashindei Peak Pangani River v t e Tanga Region Capital: Tanga Districts Bumbuli District Handeni District Handeni Town Council Kilindi District Korogwe District Korogwe Urban District Lushoto District Mkinga District Muheza District Pangani District Tanga District Native Peoples Sambaa Zigua Digo Dhaiso Segeju Bondei Ngulu Mbugu National Historic Sites Tongoni Ruins Bombo Kaburi Tanga Island Muhembo Mnarani Ndumi Vugha Yambe Island Islands Mwewe Island Ulenge Island Kirui Island Kwale Island Karange Island Yambe Island Tanga Island Maziwe Island Rivers and Lakes Pangani River Sigi River Mkulumuzi River Mligasi River Saunyi River Umba River Msangazi River Soni River Lwengera River Lake Manka Major Cities and Towns Muheza Pangani Korogwe Lushoto Handeni National Parks and Reserves Amani Nature Reserve Mkomazi National Park Saadani National Park Handeni National Forest Reserve Tanga Coelacanth Marine Park Magoroto Forest Reserve Mhamba Forest Reserve Nilo Forest Reserve Baga Forest Reserve Magamba Forest Reserve Ndelemi Forest Reserve Kisima Gonja Forest Reserve Shagayu Forest Reserve Kitumbi Forest Reserve Gole Forest Reserve Tanga Kirui Mwewe Kwale Ulenge Yambe Maziwi Tanga Island Landmarks of Tanga Amboni Caves Usambara Mountains Nguu Mountains Irente Views Mkuzi Falls Chambolo Peak (2,289m) Heritage Monuments of Tanga Urithi Tanga Museum Shabaan Robert's House, Duga Shabaan Robert Museum, Machui Old Korogwe Ulenge Island Front Range Lighthouse Ulenge Island Rear Range Lighthouse Retrieved from " https://en.wikipedia.org/w/index.php?title=Saunyi_River&oldid=1154287771 " Category : Rivers of Tanzania Hidden categories: Pages using gadget WikiMiniAtlas Articles with short description Short description matches Wikidata Infobox mapframe without OSM relation ID on Wikidata Articles containing Swahili (macrolanguage)-language text Coordinates on Wikidata Pages using infobox river with mapframe Pages using
560-683: Is the exact distance along a parallel of latitude; getting the distance along the shortest route will be more work, but those two distances are always within 0.6 m of each other if the two points are one degree of longitude apart. Like any series of multiple-digit numbers, latitude-longitude pairs can be challenging to communicate and remember. Therefore, alternative schemes have been developed for encoding GCS coordinates into alphanumeric strings or words: These are not distinct coordinate systems, only alternative methods for expressing latitude and longitude measurements. Kagera River The Kagera River , also known as Akagera River , or Alexandra Nile ,
595-465: Is used to precisely measure latitude and longitude, while a vertical datum is used to measure elevation or altitude. Both types of datum bind a mathematical model of the shape of the earth (usually a reference ellipsoid for a horizontal datum, and a more precise geoid for a vertical datum) to the earth. Traditionally, this binding was created by a network of control points , surveyed locations at which monuments are installed, and were only accurate for
630-481: The International Date Line , which diverges from it in several places for political and convenience reasons, including between far eastern Russia and the far western Aleutian Islands . The combination of these two components specifies the position of any location on the surface of Earth, without consideration of altitude or depth. The visual grid on a map formed by lines of latitude and longitude
665-526: The 1st or 2nd century, Marinus of Tyre compiled an extensive gazetteer and mathematically plotted world map using coordinates measured east from a prime meridian at the westernmost known land, designated the Fortunate Isles , off the coast of western Africa around the Canary or Cape Verde Islands , and measured north or south of the island of Rhodes off Asia Minor . Ptolemy credited him with
700-682: The Belgians defeated the Germans, entering Rwanda by the same route. The river gained international notoriety in 1994 for carrying bodies from the Rwandan genocide into Lake Victoria, causing a state of emergency to be declared in areas of Uganda, where these bodies eventually washed up. The Kagera rises in Burundi and flows into Lake Victoria. It is the largest single inflow into the lake, contributing approximately 6.4 billion cubic metres of water
735-506: The Earth's surface move relative to each other due to continental plate motion, subsidence, and diurnal Earth tidal movement caused by the Moon and the Sun. This daily movement can be as much as a meter. Continental movement can be up to 10 cm a year, or 10 m in a century. A weather system high-pressure area can cause a sinking of 5 mm . Scandinavia is rising by 1 cm a year as a result of
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#1732798529688770-729: The European ED50 , and the British OSGB36 . Given a location, the datum provides the latitude ϕ {\displaystyle \phi } and longitude λ {\displaystyle \lambda } . In the United Kingdom there are three common latitude, longitude, and height systems in use. WGS 84 differs at Greenwich from the one used on published maps OSGB36 by approximately 112 m. The military system ED50 , used by NATO , differs from about 120 m to 180 m. Points on
805-536: The French Institut national de l'information géographique et forestière —continue to use other meridians for internal purposes. 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. This is not to be conflated with
840-507: The Kartographer extension Geographic coordinate system A geographic coordinate system ( GCS ) is a spherical or geodetic coordinate system for measuring and communicating positions directly on Earth as latitude and longitude . It is the simplest, oldest and most widely used of the various spatial reference systems that are in use, and forms the basis for most others. Although latitude and longitude form
875-577: 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 and to each other. The North Pole is 90° N; the South Pole is 90° S. The 0° parallel of latitude is designated the Equator , the fundamental plane of all geographic coordinate systems. The Equator divides the globe into Northern and Southern Hemispheres . The longitude λ of
910-649: The default datum used for the Global Positioning System , and the International Terrestrial Reference System and Frame (ITRF), used for estimating continental drift and crustal deformation . The distance to Earth's center can be used both for very deep positions and for positions in space. Local datums chosen by a national cartographical organization include the North American Datum ,
945-490: The distance they give is correct within a centimeter.) The formulae both return units of meters per degree. An alternative method to estimate the length of a longitudinal degree at latitude ϕ {\displaystyle \phi } is to assume a spherical Earth (to get the width per minute and second, divide by 60 and 3600, respectively): where Earth's average meridional radius M r {\displaystyle \textstyle {M_{r}}\,\!}
980-474: The full adoption of longitude and latitude, rather than measuring latitude in terms of the length of the midsummer day. Ptolemy's 2nd-century Geography used the same prime meridian but measured latitude from the Equator instead. After their work was translated into Arabic in the 9th century, Al-Khwārizmī 's Book of the Description of the Earth corrected Marinus' and Ptolemy's errors regarding
1015-485: The lakes in the upper parts of the river basin. Because of the many waterfalls and rapids, the various sections of the Kagera River basin are clearly separated, making movements by fish between them difficult or even impossible. During the Rwandan genocide of 1994, the Kagera was used to dispose of corpses as thousands of Tutsis and Hutu political moderates were murdered on the river banks. The river brought
1050-781: The length of the Mediterranean Sea , causing medieval Arabic cartography to use a prime meridian around 10° east of Ptolemy's line. Mathematical cartography resumed in Europe following Maximus Planudes ' recovery of Ptolemy's text a little before 1300; the text was translated into Latin at Florence by Jacopo d'Angelo around 1407. In 1884, the United States hosted the International Meridian Conference , attended by representatives from twenty-five nations. Twenty-two of them agreed to adopt
1085-461: The location has moved, but because the reference system used to measure it has shifted. Because any spatial reference system or map projection is ultimately calculated from latitude and longitude, it is crucial that they clearly state the datum on which they are based. For example, a UTM coordinate based on WGS84 will be different than a UTM coordinate based on NAD27 for the same location. Converting coordinates from one datum to another requires
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1120-595: The longitude of the Royal Observatory in Greenwich , England as the zero-reference line. 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 ϕ of a point on Earth's surface is the angle between the equatorial plane and the straight line that passes through that point and through (or close to)
1155-463: The melting of the ice sheets of the last ice age , but neighboring Scotland is rising by only 0.2 cm . These changes are insignificant if a local datum is used, but are statistically significant if a global datum is used. On the GRS 80 or WGS 84 spheroid at sea level at the Equator, one latitudinal second measures 30.715 m , one latitudinal minute is 1843 m and one latitudinal degree
1190-463: The river are the Rusumo Falls , an important crossing point between Rwanda and Tanzania. It is near the town of Rusumo . The Kagera River basin is rich in fish. As of 2001 , there were at least 55 species known from the Rwandan section alone and the actual number is likely higher. Additionally, there are at least 15 undescribed species of haplochromine cichlids that are endemic to some of
1225-512: The same location. The invention of a geographic coordinate system is generally credited to Eratosthenes of Cyrene , who composed his now-lost Geography at the Library of Alexandria in the 3rd century BC. A century later, Hipparchus of Nicaea improved on this system by determining latitude from stellar measurements rather than solar altitude and determining longitude by timings of lunar eclipses , rather than dead reckoning . In
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