Results 191 to 200 of about 18,051 (229)

Establishment and Maintenance of Taiwan Geodetic Datum 1997

Journal of Surveying Engineering, 2001
A well-defined three-dimensional geodetic datum is essential to the development of a modernized nation. Also, it is of importance for the geodetic datum to be sufficiently accurate at all times to meet the requirements of many scientific and engineering applications, such as crustal deformation monitoring, national charting and mapping, cadastral ...
Ming Yang, Ching-Liang Tseng, Jyh-Yih Yu
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Geodetic Boundary-Value Problems and the Height Datum Problem

2004
The 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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Time Evolution of a World Geodetic Datum

2002
Four 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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The Establishment of Geodetic Datum in Jiaonan City

Applied Mechanics and Materials, 2012
As 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, Xue Ling Fang, Zhao Bo Xing, Jun Huang   +3 more
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The Geodetic Datum in New South Wales

Australian Surveyor, 1984
Abstract In 1969 the National Mapping Council resolved that “all future mapping at all scales” be based on the Australian Map Grid. The AMG is based on the Australian Geodetic Datum 1966, AGD66 which in turn is based on astronomical observations. In consequence of the resolution a massive effort was expended in New South Wales to establish all mapping ...
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Geodetic datum transformation to the global geocentric datum for seas and islands around Korea

Geosciences Journal, 2005
According to revisions of survey law taking effect on January 1, 2003, the Korean geodetic datum has been changed from a local geodetic to a world geodetic system. Since the datum change demands a geographical data transformation, the National Geographic Information Institute has established step-by-step plans for the transformation of the land data ...
Jay Hyoun Kwon, Tae-Suk Bae, Yoon-Soo Choi, Dong-Cheon Lee, Young-Wook Lee   +4 more
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Review of Problems Associated with Conventional Geodetic Datums

The Canadian Surveyor, 1974
After discussing the parameters needed to define a horizontal geodetic datum, the paper reviews the development of the major geodetic datums. The problem of determining the interrelationships between the various datums is analyzed and current transformation parameters are presented.
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DATUM TRANSFORMATION PARAMETERS FOR THE KENYA GEODETIC SYSTEM

Survey Review, 1993
AbstractA summary of the history of geodetic control surveys in Kenya is given and this is related to a geodetic datum. Determination of datum transformation parameters is carried out for the 7-parameter and 3-parameter models using 25 points distributed over the country.
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BACK TO BASICS (7) CHANGE OF GEODETIC DATUM

Survey Review, 1997
Abstract The coordinates of a position on the surface of the earth may be required to be expressed in more than one reference system.
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DETERMINATION OF A LOCAL GEODETIC DATUM FROM ASTROGEODESY

Survey Review, 1980
Abstract Several methods of choosing a local geodetic datum, based on astrogeodetic deflections of the vertical, are presented. The results of applying these methods to a test network covering about 200 000 square kilometres in western New South Wales, containing sufficient astronomical stations for reliable astrogeodetic levelling, are computed and ...
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