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The Great Trigonometrical Survey of India was a project that aimed to carry out a survey across the Indian subcontinent with scientific precision. It was begun in 1802 by the British infantry officer William Lambton , under the auspices of the East India Company . [ 1 ]
Longitude is given as an angular measurement with 0° at the Prime Meridian, ranging from −180° westward to +180° eastward. The Greek letter λ (lambda) [38] [39] is used to denote the location of a place on Earth east or west of the Prime Meridian. Each degree of longitude is sub-divided into 60 minutes, each of which is divided into 60 ...
During the Indian pre ancient period, weights and measure systems varied from region to region, commodity to commodity, and rural to urban areas. The weights were based on the weight of various seeds (in particular the wheat berry and Ratti) and lengths were based on the length of arms and width of fingers. During his reign, the Mughal emperor ...
The vertical lines from pole to pole are lines of constant longitude, or meridians. The circles parallel to the equator are lines of constant latitude, or parallels. The graticule shows the latitude and longitude of points on the surface. In this example meridians are spaced at 6° intervals and parallels at 4° intervals.
Keay, J. (2000) The Great Arc: The Dramatic Tale of How India Was Mapped and Everest Was Named. London: Harper Collins. ISBN 0-00-257062-9. Murdin, P. (2009) Full Meridian of Glory: Perilous Adventures in the Competition to Measure the Earth. Springer. ISBN 978-0-387-75533-5
A diagram illustrating great-circle distance (drawn in red) between two points on a sphere, P and Q. Two antipodal points, u and v are also shown. The great-circle distance, orthodromic distance, or spherical distance is the distance between two points on a sphere, measured along the great-circle arc between them. This arc is the shortest path ...
Lengths are given in divine years (a.k.a. celestial or Deva years), where a divine year lasts for 360 solar (human) years. A chatur-yuga lasts for 4.32 million solar (12,000 divine) years with 1,728,000 years of Krita-yuga , 1,296,000 years of Treta-yuga , 864,000 years of Dvapara-yuga , and 432,000 years of Kali-yuga .
Historic standard units of the city of Regensburg: from left to right, a fathom (Klafter), foot (Schuch) and ell (Öln). Prussian ell. An ell (from Proto-Germanic *alinÅ, cognate with Latin ulna) [1] is a northwestern European unit of measurement, originally understood as a cubit (the combined length of the forearm and extended hand).