Veikko Aleksanteri Heiskanen
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Veikko Aleksanteri Heiskanen was a Finnish geodesist and geophysicist. He was known for his refinement of George Biddell Airy and John Henry Pratt's theories of isostasy into his own, the Heiskanen hy
Heiskanen in 1936
The International Association of Geodesy is a constituent association of the International Union of Geodesy and Geophysics focusing on the science which measures and describes the Earth's shape, its r
West Europe–Africa Meridian-arc: a meridian arc extending from the Shetland Islands, through Great Britain, France and Spain to El Aghuat in Algeria, whose parameters were calculated from surveys carried out in the mid to late 19th century. It yielded a value for the equatorial radius of the earth a = 6 377 935 metres, the ellipticity being assumed as 1/299.15. The radius of curvature of this arc is not uniform, being, in the mean, about 600 metres greater in the northern than in the southern part.
Gravimeter with variant of Repsold-Bessel pendulum