He did much to advance stellar photography and its use in cataloguing the stars, and he was responsible for the geodetic surveys of Natal and Cape Colony, British Bechuanaland, German S.-W.
Ex Ploration The progress of geodetic surveys in Russia had long ago extended across the European half of the great empire, St Petersburg being connected with Tiflis on the southern slopes of the Caucasus by a direct system of triangulation carried out with the highest scientific precision.
But beyond the eastern shores of the Caspian no system of direct geodetic measurements by first-class triangulation has been possible, and the surveys of Asiatic Russia are separated from those of Europe by the width of that inland sea.
The arid nature of the trans-Caspian deserts has proved an insuperable obstacle to those rigorous methods of geodetic survey which distinguish Russian methods in Europe, so that Russian geography in central Asia is dependent on other means than that of direct measurement for the co-ordinate values in latitude and longitude for any given point.
In India geodetic triangulation furnishes exact sur- the basis for exact surveys as far east as the eastern veys in boundaries of Burma in longitude about loo E.
The close of the 19th century witnessed the forging of the final links in the great geodetic triangulation of India, so far as the peninsula is concerned.
Further geodetic connexion with the European systems remains to be accomplished.
Arago, with whom he had already carried out investigations on the refractive properties of different gases, in the measurement of an arc of the meridian in Spain, and in subsequent years he was engaged in various other geodetic determinations.
In Victoria the so-called geodetic survey was begun in 1858; the maps are published on a scale of 1:126,730.
A geodetic survey department, under Dr. W.
It is based upon a triangulation by the U.S. Coast and Geodetic Survey.
Of the Report of the Superintendent of the U.S. Coast and Geodetic Survey for 1893 (Washington, 1905) there is " A Historical Account of the Boundary Line between the States of Pennsylvania and Delaware, by W.
Agassiz, Three Cruises of the U.S. Coast and Geodetic Survey Steamer " Blake " ...
The International Geodetic Committee have adopted the metre as their unit of measurement.
In geodetic measurements the dimensions of the triangles vary with the temperature of the earth, but these variations in the same region of the earth are smaller than the variations of the temperature of the air, less than 10° C. Adopting as a co-efficient of dilatation of the earth's crust 0.000002, the variations of the distances are smaller than the errors of measurement (see Geodesy).
Duffield and published in the Report of the U.S. Coast and Geodetic Survey for 1895-1896 as Appendix 12, pp. 395-7 22.
But was chiefly occupied in working out the results of former years' work and in the completion of the geodetic operations in which he had been engaged during the greater part of his life.
The department of commerce and labor controls the bureaus which deal with the mercantile marine, the lighthouse and lifesaving service, commercial statistics, immigration, and the coast and geodetic survey, and the census is also under its charge.
Minor industries are represented by workshops for the production of surgical, musical and geodetic instruments; of telephone and telegraph accessories; dynamos, sewing-machines, bicycles and automobiles.
Its original use was the determination of geographical latitudes in the field work of geodetic operations; more recently it has been extensively employed for the determination S of variation of latitude, at fixed stations, under the auspices of the International Geodetic Bureau, and for the astronomical determination of the constant of aberration.
In 1816, along with Gay-Lussac, he started the Annales de chimie et de physique, and in 1818 or 1819 he proceeded along with Biot to execute geodetic operations on the coasts of France, England and Scotland.
Africa (3 vols., Cape Town, 1902-1905); Sir David Gill, Report on the Geodetic Survey of South Africa (3 vols., Cape Town, 1896-1905); W.
Among other institutions of university rank and affiliated to it are the school of mines, the agricultural college, the veterinary college, the new seminary for oriental languages, and the high school for music. The geodetic institute has been removed to Potsdam.
Baker; United States Post Office, " Map of Alaska " (1901); United States Coast and Geodetic Survey, Bulletins and maps; Bulletin American Geographical Society, February 1902, F.
Not only have many travellers of many nationalities directed their steps towards the Bam-i-dunya ("the Roof of the World") in search of adventure or of scientific information, but the government surveys of Russia and India have met in these high altitudes, and there effected a connexion which will help to solve many of the geodetic problems which beset the superficial survey of Asia.
The first variation must be taken into account in correcting geodetic observations of heights and astronomical observations of the heavenly bodies; it also has a considerable bearing on the phenomena of the twilight and the afterglow (see Refraction: § Astronomical; and Twilight).