Results 181 to 190 of about 2,285 (222)
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The Canadian Surveyor, 1973
Because of 1) the appreciable distortions in the system of coordinates known as the 1927 North American Datum, 2) the definition of oil and gas exploration permit areas and offshore boundaries in t...
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Because of 1) the appreciable distortions in the system of coordinates known as the 1927 North American Datum, 2) the definition of oil and gas exploration permit areas and offshore boundaries in t...
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Horizontal and Vertical Geodetic Datums
1989In conventional geodetic systems, locations of points on the surface of the earth may be defined either by means of natural (astronomic) or geometric (geodetic) coordinates. The natural coordinates, the astronomic latitude (Φ), longitude (Λ), and the orthometric (mean sea level height (H), being gravity dependent, are conventionally referenced to the ...
Ivan I. Mueller, Richard H. Rapp
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The Establishment of Geodetic Datum in Jiaonan City
Applied Mechanics and Materials, 2012As to Jiaonan geodetic datum, third-order horizontal control network is established through GPS while third-order leveling network is established through electronic level. This paper illustrates how to process data so as to improve horizontal and vertical precision in the process of establishing third-order horizontal control network and elevation ...
De Bao Wang +3 more
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A new analytical solution of nonlinear geodetic datum transformation
2010 18th International Conference on Geoinformatics, 2010Nonlinear geodetic datum transformation is particular suitable for the case of large rotation angles, and has been an active area of research in recent years. In this paper, we propose a new analytical solution. The method expresses the scale parameter and translation parameters as the function of rotation matrix, through the derivation process.
Huaien Zeng, Qinglin Yi
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Errata/Addendum - Australian Geodetic Datum Technical Manual
Australian Surveyor, 1994Abstract The Australian Geodetic Datum Technical Manual (Special Publication 10) was produced by the former National Mapping Council of Australia in 1984. Since that time this publication has served as the standard technical reference for the definition of the Australian Geodetic Datum (AGD), the Australian Map Grid (AMG) and the Australian Height ...
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Time Evolution of a World Geodetic Datum
2002Four fundamental geodetic parameters, namely \(\{ GM,{W_0},\Omega ,{J_2}\} \) , determine a world geodetic datum. With respect to the Somigliana-Pizzetti Level Ellipsoid I International Reference Ellipsoid these fundamental parameters from best estimates at a reference epoch determine its semi-major axis a as well as its semi-minor axis b (or ...
E. W. Grafarend, A. A. Ardalan
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Impact of Satellite Altimetry on Geodetic Datum Definition
The Canadian Surveyor, 1974Based on results of the geodetic calibration and analysis of Skylab altimeter data, the concept of determination of the geoid in the oceans — the marine geoid — from satellite altimetry has been demonstrated. In principle, the satellite altimetry geoid should combine and improve on all the strong features of the gravimetric, astrogeodetic and ...
D. M. J. Fubara, A. G. Mourad
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Geodetic Boundary-Value Problems and the Height Datum Problem
2004The analysis of boundary-value problems has always been used in geodesy as a frame to understand the nature of the problem of determining the gravity disturbing potential, with respect to well-posedness (existence, uniqueness, continuous dependence of the solution on boundary data).
SACERDOTE, FAUSTO, F. Sansò
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The use of space techniques for the connection of geodetic datums
Advances in Space Research, 1986Abstract Several techniques can provide now for ground stations tridimensional coordinates in global geodetic datum ranging from metre to centimetre. These techniques are basically : VLBI, Laser Ranging to the Moon or artificial satellites such as Lageos or Starlette, range and/or range-rate radio electric tracking of satellites such as Transit ...
C. Boucher, Z. Altamimi
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Geodetic Datum Definition of the SAGA Network
2000In cooperation with various organizations in the host countries, the GFZ Potsdam established the large-scale GPS network SAGA (South American Geodynamic Activities) covering Chile and parts of Argentina. The network consists of 215 sites including two sites on the islands Robinson Crusoe and San Felix that are part of the Nazca plate.
Detlef Angermann +2 more
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