1 Maslikov S. Yu.

Novosibirsk Astronomical Society

A thousand years ago, one of the greatest scholars of the medieval Islamic era Iranian scientist-encyclopedist Abu Rayhan al-Biruni measured the Earth globe. He described the measurement process in his several treatises. Many of the more recent comments say that he received a very precise result, unrivaled until the New Time. The author provides a detailed analysis of Biruni’s measurement method, as well as an assessment of possible errors accompanying those measurements. Step by step the measurement process is reinstated; binding is made to specific places of observation, technical parameters of the instruments used are discussed. A parallactic method and instrument for measuring elevations proposed by Biruni is considered, which could only be put into practice in the 20th century. As a result of the research it was shown that Biruni’s method is not as accurate as it was believed. In addition, it is difficult to compare the unit of the length measurement used at Biruni’s time with modern ones.
1.   Beruni Abu Reikhan Izbrannye proizvedeniya. T. V, ch. 1. Kanon Masuda (kn. I–V). Red. S. Kh. Sirazhdinov, G. P. Matvievskaya. Tashkent: FAN, 1973, 647 p.
2.   Beruni Abu Reikhan Izbrannye proizvedeniya. T. V, ch. 2. Kanon Masuda (kn. VI–XI). Red. S. Kh. Sirazhdinov, G. P. Matvievskaya. Tashkent: FAN, 1976, 634 p.
3.   Аbu Rayhan Al-Biruni Geodezija (Opredelenie granic mest dlja utochnenija rasstojanij mezhdu naseljonnymi punktami). Issledovanija, perevod i primechanija P. G. Bulgakova.Izbrannye proizvedenija, Tashkent: Fan, 1966, Vol. III, 364 p. URL: http://www.astro-cabinet.ru/library/Biruni/Geodezia/Geodezia_Ogl.htm
4.   Gajdaev P.A., Bol'shakov V.D. Teoriya matematicheskoj obrabotki geodezicheskih izmerenij. Izd. 2-e, pererab. i dop.. M.: Nedra, 1977, 367 p.
5.   Bulgakov P. G. Biruni i ego «Geodeziya». V kn. Biruni Abu Reikhan. Geodeziya (Opredelenie granits mest dlya utochneniya rasstoyanii mezhdu naselennymi punktami), Tashkent: FAN, 1966, pp. 7–78.
6.   Kazanskii K. V. Zemnaya refraktsiya nad obshirnymi vodnymi poverkhnostyami. Leningrad: Gidrometeoizdat, 1966, 192 p.
7.   Krasavtsev B. I. Morekhodnaya astronomiya. Izd. 2-e. Moskva: Transport, 1978, 304 p.
8.   Narkhodjaev K. N. Geodezicheskie raboty Beruni. Tashkent: Uzbekistan, 1977, 112 p.
9.   Praktikum po geodezii. Pod red. G. G. Poklada. Moskva: Akademicheskii proekt, 2012, 552 p.
10.   Gomez A. G. Biruni’s Measurement of the Earth. URL: www.academia.edu/8166456/Birunis_measurement_of_the_Earth (accessed: 06.06.2019).
Maslikov S. Yu., 
(2019) Biruni’s Method of Measuring the Earth. Geodesy and cartography = Geodezia i Kartografia, 80(7), pp. 57-64. (In Russian). DOI: 10.22389/0016-7126-2019-949-7-57-64
Publication History
Received: 27.08.2018
Accepted: 07.06.2019
Published: 20.08.2019


2019 July DOI:

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