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The Bessel ellipsoid was derived in 1841 by Friedrich Wilhelm Bessel, based on several arc measurements and other data of continental geodetic networks of Europe, Russia and the British Survey of India. It is based on 10 meridian arcs and 38 precise measurements of the astronomic latitude and longitude (see also astro geodesy).
A geodetic datum or geodetic system (also: geodetic reference datum, geodetic reference system, or geodetic reference frame, or terrestrial reference frame) is a global datum reference or reference frame for unambiguously representing the position of locations on Earth by means of either geodetic coordinates (and related vertical coordinates) or geocentric coordinates. [1]
A geographic coordinate system (GCS) is a spherical or geodetic coordinate system for measuring and communicating positions directly on Earth as latitude and longitude. [1] It is the simplest, oldest and most widely used type of the various spatial reference systems that are in use, and forms the basis for most others.
The World Geodetic System (WGS) is a standard used in cartography, geodesy, and satellite navigation including GPS.The current version, WGS 84, defines an Earth-centered, Earth-fixed coordinate system and a geodetic datum, and also describes the associated Earth Gravitational Model (EGM) and World Magnetic Model (WMM).
The Universal Transverse Mercator (UTM) is a map projection system for assigning coordinates to locations on the surface of the Earth.Like the traditional method of latitude and longitude, it is a horizontal position representation, which means it ignores altitude and treats the earth surface as a perfect ellipsoid.
The National Monument (Indonesian: Monumen Nasional, abbreviated Monas) is a 132 m (433 ft) obelisk in the centre of Merdeka Square, Central Jakarta. It is the national monument of the Republic of Indonesia , built to commemorate the struggle for Indonesian independence .
In 2005, the government of India unveiled a bold scheme to bring its poorest citizens into the 21st century. It would commission a series of coal-fired power plants — each with seven times the capacity of its average U.S. counterpart — that would provide cheap electricity in a country where one-third of the population lives off the grid.
The usage of these maps in India, Pakistan and China are governed by different laws that restrict depictions of boundaries other than what is officially recognized by the state. Please check local laws and modify the map accordingly before use.