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46-944: Coordinates : 38°09′N 22°04′E / 38.150°N 22.067°E / 38.150; 22.067 For the village in Tritaia, southwestern Achaea, see Tritaia . Community in Greece Pteri Πτέρη Community [REDACTED] [REDACTED] Pteri Coordinates: 38°09′N 22°04′E / 38.150°N 22.067°E / 38.150; 22.067 Country Greece Administrative region West Greece Regional unit Achaea Municipality Aigialeia Municipal unit Aigio Population (2021) • Community 439 Time zone UTC+2 ( EET ) • Summer ( DST ) UTC+3 ( EEST ) [REDACTED] Pteri ( Greek : Πτέρη )
92-502: 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
138-456: 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 ),
184-588: 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
230-473: 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
276-411: 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
322-475: 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
368-519: 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
414-547: Is a diminutive form (typical in Greek language) of the word Bosta , which comes from the French word Bastion (middle French Bastillon). From Βosta was derived the word Bostan/Bostani , which is common in the Greek and Turkish languages, and means garden (other linguists believe that Bosta is of Persian origin). The city was captured by the Crusaders in the early 13th century and became
460-591: Is a port town on the Gulf of Corinth , and takes its name from the ancient city of Aegium . The southwestern part of the municipality consists of the foothills of Panachaiko mountain. The river Selinountas flows into the Gulf of Corinth in Valimitika , 5 km east of Aigio town centre. Before the founding of the city, the area had a Neolithic settlement. The city of Aigion was founded during Homeric times and became part of
506-578: Is a town and a former municipality in Achaea , West Greece , on the Peloponnese . Since the 2011 local government reform, it is part of the municipality Aigialeia , of which it is the seat and a municipal unit. Aigio is the second largest city in Achaea after Patras . The municipal unit has an area of 151.101 km . It has a population of around 26,000 while the municipality has about 49,000 inhabitants. Aigio
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#1732876027471552-797: Is a village and a community in Achaea , Greece . It is located about 15 km (9.3 mi) south of Aigio , and east of the Selinountas river valley. Pteri is part of the municipal unit of Aigio . Population [ edit ] Year Village population Community population 1981 - 781 1991 30 - 2001 20 633 2011 4 466 2021 21 439 See also [ edit ] List of settlements in Achaea Konstantinos Gofas References [ edit ] ^ "Αποτελέσματα Απογραφής Πληθυσμού - Κατοικιών 2021, Μόνιμος Πληθυσμός κατά οικισμό" [Results of
598-456: 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
644-406: 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
690-433: Is mentioned that the area of Aigio produced 7.5-10 million Kgs of raisins and 600 thousand kgs of olive oil annually. Today the port is used as a fruit import hub for Chiquita Brands International , mainly for the importation of bananas. A new 256 m-long pier northwest of the existing port was inaugurated on 7 August 2013. The whole project cost 8.6 million Euros and is intended to enhance trade and tourism opportunities for
736-772: 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. Aigio Aigio , also written as Aeghion, Aegion, Aegio, Egio ( Greek : Αίγιο , romanized : Aígio , pronounced [ˈeʝio] ; Latin : Aegium ),
782-465: 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
828-515: The Chronicle of the Morea (14th century), it is first mentioned with this new name. During the following centuries, the name is found in various documents having different spelling forms such as Bostizza , Ligustizza , Bostitza , Bostiza , Vostizza . Some scholars interpret the name as having a Slavic origin. The German linguist and Slavicist Max Vasmer gives two possible interpretations, one from
874-471: 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
920-743: The Roman conquest in 146 BC. After the annexation of Achaia, the Romans removed the wall of the city and Aegium lost its importance. After the division of the Roman Empire in 395 AD, Aegium became a part of the Eastern Roman Empire and later the Byzantine Empire . In 805 it was captured by Slavic tribes during the Slavic invasions . Probably between 9th and 13th century it was renamed to Vostitsa (Βοστίτσα). In
966-408: The plague epidemic, numerous Avar or Slav shepherds migrated to this area. One of their leaders had the name "Vostitzas", from whom the town later took its name. 19th-century German writer Joseph Baron Ow, in his book Die Abstammung der Griechen und die Irrthümer und Täuschungen des Dr. Ph. Fallmerayer , written in 1846, gives a completely different interpretation. He writes that the name Bostiza
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#17328760274711012-515: 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
1058-1910: The 2021 Population - Housing Census, Permanent population by settlement] (in Greek). Hellenic Statistical Authority. 29 March 2024. v t e Subdivisions of the municipality of Aigialeia Municipal unit of Aigeira Aigeira Aiges Ampelokipoi Chrysanthio Exochi Monastiri Oasi Perithori Seliana Sinevro Vela Municipal unit of Aigio Aigio Chatzis Dafnes Digeliotika Kouloura Koumari Kounina Mavriki Melissia Paraskevi Pteri Selinountas Temeni Valimitika Municipal unit of Akrata Agia Varvara Akrata Ampelos Kalamias Krathio Mesorrougi Paralia Platanou Peristera Platanos Porovitsa Sylivainiotika Valimi Voutsimos Zarouchla Municipal unit of Diakopto Ano Diakopto Diakopto Elaionas Eliki Katholiko Keryneia Mamousia Nikolaiika Rizomylos Rodia Trapeza Zachloritika Municipal unit of Erineos Arravonitsa Damakini Kamares Neos Erineos Salmeniko Ziria Municipal unit of Sympoliteia Agios Konstantinos Alsos Dimitropoulo Doukanaiika Gkraika Grigori Krini Aigaleias Lakka Longos Mageiras Myrovrysi Nerantzies Rododafni Selianitika Toumpa Verino Retrieved from " https://en.wikipedia.org/w/index.php?title=Pteri&oldid=1251944772 " Categories : Aigialeia Aigio Populated places in Achaea Hidden categories: Pages using gadget WikiMiniAtlas CS1 Greek-language sources (el) Articles with short description Short description
1104-499: 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
1150-708: 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
1196-524: 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
1242-528: 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
1288-566: 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
1334-585: The city. Aigio houses two branch departments of the Technological Educational Institute of Patras , the department of Physiotherapy and the Optics and Optometry department. The Aigio General Hospital is situated a few kilometres out of the town and has a capacity of 100 beds. The Hospital performs the greatest number of laparoscopic surgeries in Greece, while more than 50,000 people are examined on
1380-648: The coast in the Corinthian Gulf. They are sometimes associated with Plato's Atlantis myth. Archeologists are excavating the site. From 330 BC, Aigion was for fifty years under the Kingdom of Macedon . Around the year 275 BC, the people expelled the Macedonian garrison and the city joined the new Achaean League . With the famous temple of Zeus Homarios , Aigion became the Achaean assembly place. It remained their capital until
1426-613: 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 ,
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1472-490: 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}}\,\!}
1518-434: The first Achaean League since around 800 BC. The city had several Olympic winners, including Xenophon , Ladas ( stadion race ), Athenodorus (Αθηνόδωρος, stadion race), Straton (Στράτων, pancration and wrestling ). After the disaster of Helike , which was destroyed by an earthquake and buried by a tsunami in 373 BC, Aigion took the territory of the neighbouring city. The ruins of Helike were discovered in 2000 off
1564-468: 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
1610-749: 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
1656-461: 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
1702-579: 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)
1748-460: 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
1794-507: 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
1840-679: The seat of a barony of the Principality of Achaea . In the early 15th century, it was conquered by the Despotate of the Morea . In 1459 it was conquered by the Ottoman Empire , which ruled it until the outbreak of the Greek War of Independence , except for brief interruptions by the Venetians from 1463 until 1470 , and from 1685 until 1715 . The city was captured by Greek rebels on 26 March 1821, and
1886-418: The town was officially renamed to its ancient name. On June 15, 1995, a serious earthquake destroyed many buildings and damaged roads in the downtown and southwestern sections, with a number of casualties. The earthquake shattered Aigio: small memorials are found throughout the city, with candles aglow day and night to remember the victims. With drought heightening risk, the mountainous countryside near Aigio
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1932-481: The word * Voščica (cf. Serbo-Croatian Voščíca [ sic ] and Voštane , and Slovenian Vošče ) and one from the Church Slavonic word ovoštь , meaning "fruit". Dionysios Zakythinos , a Greek scholar of Byzantium, gives a similar interpretation, explaining the name as meaning "fruit-bearing place". Christos Coryllos, in his detailed "Description of Greece", had given another interpretation. He writes that after
1978-730: Was 45 minutes long. In May 2011, the shipping company that operated the ferry announced that it was suspending the ferry because of financial reasons. In 2019 plans for an electric ferry were announced. The port also has railroad tracks, but the Hellenic Railways Organisation (OSE) announced suspension of service in Aigio and across the Peloponnese in January 2011. As of 2020, a new double standard-gauge railway line connects Aigio with Kiato and Athens . The new Aigio railway station
2024-499: Was built at the east outskirts of the city. It opened in 22 June 2020, and a few days later it was inaugurated by the minister of transportation of Greece. Roads serving the city are the A8 motorway (Athens–Patras) and EO31 (Aigio– Kalavryta ). Aigio, along with Patras and Piraeus, has been one of the main export hubs for Corinthian raisins since the 19th century. In the book Geography of Greece - Achaia (1903) by Christos Coryllos, it
2070-450: Was one of the first towns to be liberated from Ottoman rule. In July 1822, at Akrata , near the town, a force of Greek fighters under Londos, Zaimis and Petimezas surrounded and attacked a group of 4000 Turks marching to Patras , after their defeat at the Battle of Dervenakia . Only a few Turks were lucky to escape when Yusuf Pasha sent ships to take them to Patras. After Greek Independence,
2116-450: Was severely damaged by the 2007 Greek forest fires . Climate change has increased temperature extremes and other fires have broken out in years since. Until May 2011, a ferry served the port of Aigio, connecting it to the north-eastern mainland city of Agios Nikolaos (not to be confused with the Cretan city of the same name ). The ferry service was limited, with three ferries daily. The trip
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