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41-850: Coordinates : 38°5′N 20°43′E / 38.083°N 20.717°E / 38.083; 20.717 Community in Greece Valerianos Βαλεριάνος Community [REDACTED] [REDACTED] Valerianos Coordinates: 38°5′N 20°43′E / 38.083°N 20.717°E / 38.083; 20.717 Country Greece Administrative region Ionian Islands Regional unit Kefalonia Municipality Argostoli Municipal unit Eleios-Pronnoi Population (2021) • Community 284 Time zone UTC+2 ( EET ) • Summer ( DST ) UTC+3 ( EEST ) Valerianos ( Greek : Βαλεριάνος )
82-502: 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
123-456: 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 ),
164-588: 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
205-473: 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
246-526: A wooden bridge across the lagoon . This was done in 1813 by Colonel Charles Philip de Bosset, a Swiss engineer in the employ of the British army. Four years later stone arches were added and, after some 26 years, the entire bridge was rebuilt in stone. In continuous use until 2005, this narrow bridge is now closed to traffic, currently undergoing renovation by the Greek Ministry of Culture. Almost halfway along
287-411: 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
328-475: 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
369-519: 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
410-409: Is a town and a municipality on the island of Kefalonia , Ionian Islands , Greece . Since the 2019 local government reform it is one of the three municipalities on the island. It has been the capital and administrative centre of Kefalonia since 1757, following a population shift down from the old capital of Agios Georgios, also known as Kastro, to take advantage of the trading opportunities provided by
451-740: Is a village and a community in the island of Cephalonia , Greece . The community includes the villages Atsoupades and Plateies. It is situated at the southeastern foot of Mount Ainos , at about 190 m elevation. It is 0.5 km northwest of Chionata , 3 km southwest of Pastra , 9 km southwest of Poros and 23 km southeast of Argostoli . Valerianos was devastated by the 1953 Ionian earthquake . Population [ edit ] Year Population village Population community 1981 - 254 1991 142 - 2001 150 262 2011 154 302 2021 132 284 Notable people [ edit ] Juan de Fuca (1536–1602), Greek maritime pilot in
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#1732844951076492-456: Is different from Wikidata Coordinates on Wikidata Articles containing Greek-language text 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
533-452: 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
574-761: 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. Argostoli Argostoli ( Greek : Αργοστόλι , romanized : Argostóli , Katharevousa : Greek : Ἀργοστόλιον , romanized : Argostólion )
615-463: Is the holiday resort town Lassi, which has several small beaches. Following the Kapodistrias reform of 1997, communities around the town united to form a larger municipality of Argostoli, which included the settlements of Spilia, Helmata, Kompothekrata, Lassi, Minies and ten former communities: Agona, Davgata, Dilinata, Zola, Thinia, Kourouklata, Nifi, Troyiannata, Faraklata and Farsa. As a result of
656-465: 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
697-644: The De-Bosset Bridge stands a stone column built by the British to celebrate their presence. The coastal road out of Argostoli to the west was known during the Venetian period as the ‘Piccolo Gyro’. Along the Piccolo Gyro, in the Vlikha area facing Lixouri, lie the ‘Swallow Holes’ of Katovothres, a geological phenomenon. Sea water disappears underground and travels under the island, re-emerging around fourteen days later in
738-471: 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
779-515: 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
820-459: The 2010 Kallikratis Programme , this municipality became a municipal unit of the municipality of Kefalonia, which covered the whole island. In 2019 three new municipalities were formed on the island, including Argostoli. The municipality of Argostoli consists of the following municipal units (former municipalities): The municipal unit of Argostoli is subdivided into the following communities. Constituent villages are given in brackets: Between
861-499: 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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#1732844951076902-708: 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
943-524: 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
984-561: The Karavomylos area of Sami, having passed through the nearby, underground Melissani lake. The power of this sea water was harnessed, in 1835, to power a water mill. Further along the Piccolo Gyro is the Agion Theodoron lighthouse, named after the small adjacent church. More commonly known as the Fanari lighthouse, this too was built during the British occupation, in 1829. The original building
1025-524: The Koutavos Lagoon and the De-Bosset Bridge is the new bus station which connects Argostoli with the other towns and some of the villages on the island, as well as with Athens and Patras . The main ferry port, connecting Argostoli with the mainland (via Kyllini ) and Zakynthos (also known as Zante ) is next to this building with the Lixouri ferry (once an hour in winter, twice an hour in summer) docking
1066-528: The basis for most others. Although latitude and longitude form 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
1107-566: 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
1148-613: 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 ,
1189-490: 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}}\,\!}
1230-553: The east of Argostoli, at the end of the bay, beneath the aforementioned Castle of St. George, sits the Koutavos Lagoon, a feeding ground for the Loggerhead turtles (Caretta caretta). Now a nature reserve, the Koutavos Lagoon was once an almost impassable swamp where mosquitoes and malaria were rife. During the period of British occupation of the Ionian Islands, Kefalonia's governor, General Sir Charles James Napier , constructed
1271-468: 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
Valerianos - Misplaced Pages Continue
1312-684: The law courts, originally constructed by the British with stone from the Cyclopean site at nearby Krani. Along Lithostroto, next to the Catholic Church, is a tiny museum (open some mornings and most evenings) dedicated to the soldiers of the Acqui Division . A little further along is the Bell Tower, rebuilt in 1985 to house the original clock mechanism. On the Ionian Sea coast southwest of the town centre
1353-749: 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
1394-461: 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
1435-579: 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)
1476-460: 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
1517-1068: The municipality of Argostoli Municipal unit of Argostoli Agkonas Argostoli Davgata Dilinata Faraklata Farsa Kourouklata Nyfi Thinaia Troianata Zola Municipal unit of Eleios-Pronnoi Agia Eirini Agios Nikolaos Arginia Chionata Markopoulo Mavrata Pastra Poros Skala Valerianos Xenopoulo Municipal unit of Leivatho Kerameies Karavados Lakithra Lourdata Metaxata Mousata Peratata Pesada Spartia Svoronata Vlachata Municipal unit of Omala Omala Retrieved from " https://en.wikipedia.org/w/index.php?title=Valerianos&oldid=1253105472 " Categories : Populated places in Cephalonia Eleios-Pronnoi Hidden categories: Pages using gadget WikiMiniAtlas CS1 Greek-language sources (el) Articles with short description Short description
1558-507: 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
1599-792: The service of the Spanish king Philip II See also [ edit ] List of settlements in Cephalonia References [ edit ] ^ "Αποτελέσματα Απογραφής Πληθυσμού - Κατοικιών 2021, Μόνιμος Πληθυσμός κατά οικισμό" [Results of the 2021 Population - Housing Census, Permanent population by settlement] (in Greek). Hellenic Statistical Authority. 29 March 2024. ^ Επίτομο Γεωγραφικό Λεξικό της Ελλάδος (Geographical Dictionary of Greece), Μιχαήλ Σταματελάτος, Φωτεινή Βάμβα-Σταματελάτου, εκδ. Ερμής, ΑΘήνα 2001 v t e Subdivisions of
1640-521: The sheltered bay upon which Argostoli sits. Argostoli developed into one of the busiest ports in Greece , leading to prosperity and growth. The municipality has an area of 377.0 km and the municipal unit (the pre-2010 municipality) has an area of 157.670 km . The 2021 census recorded a population of 13,666 in the Argostoli municipal unit, and 23,574 in the municipality in its post-2019 extension. To
1681-512: Was destroyed in the earthquake of 1953, the recently restored present structure was rebuilt, complete with Doric-style columns, from the original plans. Buildings that weren't shattered by German bombing in 1943 were destroyed in 1953 by the earthquake that razed virtually all of Kefalonia, apart from the Fiskardo area, to the ground. Opposite the Archaeological Museum of Argostoli are