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.
India
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India, officially the Republic of India, is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and it is bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast. It shares land borders with Pakistan to the west, China, Nepal, and Bhutan to the northeast, in the Indian Ocean, India is in the vicinity of Sri Lanka and the Maldives. Indias Andaman and Nicobar Islands share a border with Thailand. The Indian subcontinent was home to the urban Indus Valley Civilisation of the 3rd millennium BCE, in the following millennium, the oldest scriptures associated with Hinduism began to be composed. Social stratification, based on caste, emerged in the first millennium BCE, early political consolidations took place under the Maurya and Gupta empires, the later peninsular Middle Kingdoms influenced cultures as far as southeast Asia. In the medieval era, Judaism, Zoroastrianism, Christianity, and Islam arrived, much of the north fell to the Delhi sultanate, the south was united under the Vijayanagara Empire. The economy expanded in the 17th century in the Mughal empire, in the mid-18th century, the subcontinent came under British East India Company rule, and in the mid-19th under British crown rule. A nationalist movement emerged in the late 19th century, which later, under Mahatma Gandhi, was noted for nonviolent resistance, in 2015, the Indian economy was the worlds seventh largest by nominal GDP and third largest by purchasing power parity. Following market-based economic reforms in 1991, India became one of the major economies and is considered a newly industrialised country. However, it continues to face the challenges of poverty, corruption, malnutrition, a nuclear weapons state and regional power, it has the third largest standing army in the world and ranks sixth in military expenditure among nations. India is a constitutional republic governed under a parliamentary system. It is a pluralistic, multilingual and multi-ethnic society and is home to a diversity of wildlife in a variety of protected habitats. The name India is derived from Indus, which originates from the Old Persian word Hindu, the latter term stems from the Sanskrit word Sindhu, which was the historical local appellation for the Indus River. The ancient Greeks referred to the Indians as Indoi, which translates as The people of the Indus, the geographical term Bharat, which is recognised by the Constitution of India as an official name for the country, is used by many Indian languages in its variations. Scholars believe it to be named after the Vedic tribe of Bharatas in the second millennium B. C. E and it is also traditionally associated with the rule of the legendary emperor Bharata. Gaṇarājya is the Sanskrit/Hindi term for republic dating back to the ancient times, hindustan is a Persian name for India dating back to the 3rd century B. C. E. It was introduced into India by the Mughals and widely used since then and its meaning varied, referring to a region that encompassed northern India and Pakistan or India in its entirety
3.
States and union territories of India
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India is a federal union comprising twenty-nine states and seven union territories. The states and union territories are further subdivided into districts and further into smaller administrative divisions, the Constitution of India distributes the sovereign executive and legislative powers exercisable with respect to the territory of any State between the Union and that State. The Indian subcontinent has been ruled by different ethnic groups throughout its history. Between 1947 and 1950, the territories of the states were politically integrated into the Indian Union. The new Constitution of India, which came into force on 26 January 1950, the new republic was also declared to be a Union of States. The nine Part A states were Assam, Bihar, Bombay, Madhya Pradesh, Madras, Orissa, Punjab, Uttar Pradesh, and West Bengal. The eight Part B states were former princely states or groups of states, governed by a rajpramukh, who was usually the ruler of a constituent state. The rajpramukh was appointed by the President of India, the Part B states were Hyderabad, Jammu and Kashmir, Madhya Bharat, Mysore, Patiala and East Punjab States Union, Rajasthan, Saurashtra, and Travancore-Cochin. The ten Part C states included both the former chief commissioners provinces and some states, and each was governed by a chief commissioner appointed by the President of India. The Part C states were Ajmer, Bhopal, Bilaspur, Coorg, Delhi, Himachal Pradesh, Cutch, Manipur, Tripura, the only Part D state was the Andaman and Nicobar Islands, which were administered by a lieutenant governor appointed by the central government. The Union Territory of Puducherry was created in 1954 comprising the previous French enclaves of Pondichéry, Karaikal, Yanam, Andhra State was created on 1 October 1953 from the Telugu-speaking northern districts of Madras State. The States Reorganisation Act of 1956 reorganised the states based on linguistic lines resulting in the creation of the new states, as a result of this act, Madras State retained its name with Kanyakumari district added to from Travancore-Cochin. Andhra Pradesh was created with the merger of Andhra State with the Telugu-speaking districts of Hyderabad State in 1956, kerala was created with the merger of Malabar district and the Kasaragod taluk of South Canara districts of Madras State with Travancore-Cochin. The Laccadive Islands which were divided between South Canara and Malabar districts of Madras State were united and organised into the territory of Lakshadweep. Bombay State was enlarged by the addition of Saurashtra State and Kutch State, Rajasthan and Punjab gained territories from Ajmer and Patiala and East Punjab States Union respectively and certain territories of Bihar was transferred to West Bengal. Bombay State was split into the states of Gujarat and Maharashtra on 1 May 1960 by the Bombay Reorganisation Act. Nagaland was formed on 1 December 1963, the Punjab Reorganisation Act of 1966 resulted in the creation of Haryana on 1 November and the transfer of the northern districts of Punjab to Himachal Pradesh. The act also designated Chandigarh as a territory and the shared capital of Punjab
4.
Kerala
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Kerala historically known as Keralam, is an Indian state in South India on the Malabar Coast. It was formed on 1 November 1956 following the States Reorganisation Act by combining Malayalam-speaking regions, spread over 38,863 km2, it is bordered by Karnataka to the north and northeast, Tamil Nadu to the east and south, and the Lakshadweep Sea to the west. With 33,387,677 inhabitants as per the 2011 Census, Malayalam is the most widely spoken language and is also the official language of the state. The region has been a prominent spice exporter since 3000 BCE, the Chera Dynasty was the first prominent kingdom based in Kerala, though it frequently struggled against attacks by the neighbouring Cholas and Pandyas. In the 15th century, the spice trade attracted Portuguese traders to Kerala, after independence, Travancore and Cochin joined the Republic of India and Travancore-Cochin was given the status of a state in 1949. In 1956, Kerala state was formed by merging Malabar district, Travancore-Cochin, Hinduism is practised by more than half of the population, followed by Islam and Christianity. The culture is a synthesis of Aryan and Dravidian cultures, developed over millennia, under influences from other parts of India, the production of pepper and natural rubber contributes significantly to the total national output. In the agricultural sector, coconut, tea, coffee, cashew, the states coastline extends for 595 kilometres, and around 1.1 million people in the state are dependent on the fishery industry which contributes 3% to the states income. The state has the highest media exposure in India with newspapers publishing in nine languages, mainly English, Kerala is one of the prominent tourist destinations of India, with backwaters, beaches, Ayurvedic tourism and tropical greenery as its major attractions. The name Kerala has an uncertain etymology, One popular theory derives Kerala from Kera and alam is land, thus land of coconuts, this also happens to be a nickname for the state due to abundance of coconut trees and its use by the locals. The word Kerala is first recorded in a 3rd-century BCE rock inscription left by the Maurya emperor Ashoka, the inscription refers to the local ruler as Keralaputra, or son of Chera. This contradicts the theory that Kera is from coconut tree, at that time, one of three states in the region was called Cheralam in Classical Tamil, Chera and Kera are variants of the same word. The word Cheral refers to the oldest known dynasty of Kerala kings and is derived from the Proto-Tamil-Malayalam word for lake, the earliest Sanskrit text to mention Kerala is the Aitareya Aranyaka of the Rigveda. It is also mentioned in the Ramayana and the Mahabharata, the two Hindu epics, the Skanda Purana mentions the ecclesiastical office of the Thachudaya Kaimal who is referred to as Manikkam Keralar, synonymous with the deity of the Koodalmanikyam temple. Keralam may stem from the Classical Tamil cherive-alam or chera alam, the Greco-Roman trade map Periplus Maris Erythraei refers to Keralaputra as Celobotra. According to Hindu mythology, the lands of Kerala were recovered from the sea by the warrior sage Parasurama. Parasurama threw his axe across the sea, and the water receded as far as it reached, according to legend, this new area of land extended from Gokarna to Kanyakumari. The land which rose from sea was filled with salt and unsuitable for habitation, so Parasurama invoked the Snake King Vasuki, out of respect, Vasuki and all snakes were appointed as protectors and guardians of the land
5.
Idukki district
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Idukki is one of the 14 districts of Kerala state, India, created on 26 January 1972. At that time, the headquarters was at Kottayam. In June 1976 it was moved to Painavu, Idukki which lies in the Western Ghats of Kerala. Idukki is the second largest district in area but has the lowest population density, Idukki has a vast forest reserve area, more than a half of the district is covered by forests. The urban areas are densely populated villages are sparsely populated. The name of the district is derived from the Malayalam word Idukku, Idukki has an area of 4,358 km2 and is the second largest District of Kerala. Rugged mountains and forests cover about 97 percent of the area of the District. The district is only by road. Rail and airlink is not available, National Highway NH49 and State highways 13 and 33 passes through the district. Anamudi, the highest peak in India south of the Himalayas, is in the Kuttampuzha Panchayat of Adimali Block, thirteen other peaks in the district exceed a height of 2,000 m. The Periyar, Thodupuzhayar and Thalayar are the important rivers of the district, Idukki Dam, Asias largest Arch Dam is located at Idukki Township of Idukki Taluk. The point where the Periyar flows through the gorge formed between two massive rocks known as Kuravan and Kurathi is the site of the Idukki arch dam. The Idukki Hydroelectic project caters for more than 60% of the requirements of the state of Kerala. According to the 2011 census Idukki district has a population of 1,107,453 and this ranks it as 416th among the 640 districts of India. The district has a density of 254 inhabitants per square kilometre. Its population growth rate over the decade 2001–2011 was −1. 93%, Idukki has a sex ratio of 1006 females for every 1000 males, and a literacy rate of 92.2 per cent. According to the 2011 census, Hindus make up 48, 86% of the population, Christians 43. 42%, Muslims 7. 41%. Idukki district is the first district in India to get connected with super-fast broad band system as a part of Digital India Munnar was the resort of the British Government in the south
6.
Malayalam
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Malayalam /mʌləˈjɑːləm/ is a language spoken in India, predominantly in the state of Kerala. It is one of the 22 scheduled languages of India and was designated as a Classical Language in India in 2013 and it was developed to the current form mainly by the influence of the poet Thunchaththu Ezhuthachan in the 16th century. Malayalam has official status in the state of Kerala and in the union territories of Lakshadweep. It belongs to the Dravidian family of languages and is spoken by some 38 million people, according to one theory, Malayalam originated from Middle Tamil in the 7th century. However, the current understanding proposes the separation of Malayalam from Proto-Dravidian in the pre-historic era, Malayalam incorporated many elements from Sanskrit through the ages. Before Malayalam came into being, Old Tamil was used in literature and courts of a region called Tamilakam, including present day Kerala state, silappatikaramit was written by Chera prince Ilango Adigal from Chunkaparra, and is considered a classic in Sangam literature. Modern Malayalam still preserves many words from the ancient Tamil vocabulary of Sangam literature, the earliest script used to write Malayalam was the Vatteluttu alphabet, and later the Kolezhuttu, which derived from it. As Malayalam began to borrow words as well as the rules of grammar from Sanskrit. This developed into the modern Malayalam script, many medieval liturgical texts were written in an admixture of Sanskrit and early Malayalam, called Manipravalam. The oldest literary work in Malayalam, distinct from the Tamil tradition, is dated from between the 9th and 11th centuries, the first travelogue in any Indian language is the Malayalam Varthamanappusthakam, written by Paremmakkal Thoma Kathanar in 1785. Due to its lineage deriving from both Tamil and Sanskrit, the Malayalam script has the largest number of letters among the Indian language orthographies, the Malayalam script includes letters capable of representing almost all the sounds of all Indo-Aryan and Dravidian languages. Malayalam serves as a language on the islands including the Mahl-dominated Minicoy Island. The word Malayalam originated from the Sanskrit resp, Malayalam words malai or mala, meaning hill, and elam, meaning region. Malayalam thus translates as hill region and used to refer to the land of the Chera dynasty, the language Malayalam is alternatively called Alealum, Malayalani, Malayali, Malean, Maliyad, and Mallealle. The word Malayalam originally meant only for the name of the region, Malayanma or Malayayma represented the language. With the emergence of modern Malayalam language, the name of the language started to be known by the name of the region, hence now, the word Malayanma is considered by some to represent the olden Malayalam language. The language got the name Malayalam during the mid 19th century, the origin of Malayalam, an independent offshoot of the proto-Dravidian language, has been and continues to be an engaging pursuit among comparative historical linguists. Together with Tamil, Toda, Kannada and Tulu, Malayalam belongs to the group of Dravidian languages
7.
Marayur
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Marayur or Marayoor is a town in Idukki district of Kerala, India. It is located 42 kilometers north of Munnar on SH17 connecting Munnar with Udumalpet, Marayur is the only place in Kerala that has natural sandalwood forests. Ancient dolmens and rock paintings in Marayur date back to the Stone Age, in 1991 Marayur had a population of 9,590. Marayur claims to be a part of a Stone Age civilization that is as old as 10,000 B. C and it is also home to a later period of large-scale dolmen-building. People migrated from Tamil Nadu to this area when the Madurai king Thirumalainaicker was defeated by Tippu Sultan, the migrants created five villages, being Kanthalloor, Keezhanthur, Karayur, Marayur and Kottakudi. These villages were called the Anju nadu, literally meaning “five lands”, also called Muniyaras, these dolmens belong to the Iron Age. These dolmenoids were burial chambers made of four stones placed on edge, some of these Dolmenoids contain several burial chambers, while others have a quadrangle scooped out in laterite and lined on the sides with granite slabs. These are also covered with cap stones, at least one of them has a perfectly circular hole of 28 cm diameter inside the underground chamber. This region has several types of dolmens, large number of them are overground with about 70–90 cm height. Another type has a height 140–170 cm, there is an overground dolmen with double length up to 350 cm. Fragments of burial urns are also available in the region near the dolmens and this indicates that the dolmens with 70–90 cm height were used for burial of the remains of people of high social status. Burial urns were used for the burial of the remains of commoners, the dolmens with raised roofs might have been used for habitation of people. Why some people lived in the cemeteries has not been satisfactorily explained, ancient rock paintings are part of Marayur heritage at Attala, Ezhuthu Guha, Kovilkadavu and Manala in Marayur panchayat. Attala is situated in the west part of Marayur Township and more than 90 painted motifs can be seen here, the rock paintings of Attala are situated in a colossal east facing rock shelter 1500 meters above mean sea level. Most of the paintings at Attala are abstract designs except for a few human, Ezhuthu Guha rock paintings are sited in the Koodakavu Sandalwood Reserve Forest at Marayur in the Marayur Panchayat at an elevation of 1000 meters above mean sea level. More or less 90 painted motifs can be seen here, however, as the place is the most famous rock art site in Kerala, it attracts a large number of visitors and has been extensively vandalized since it was brought to wide public attention. Kovilkadavu is less than five kilometers from Marayur town and the place is famous for Neolithic dolmens, ten 10 painted motifs are located on the south-western slope of the plateau overlooking the Pambar river. There is a painting at Manala in Chinnar Wildlife Sanctuary of Marayur near the Alampetty tribal settlement
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