Results 231 to 240 of about 17,261 (248)
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Transformation of coordinates between two horizontal geodetic datums
Journal of Geodesy, 1996The following topics are discussed in this paper: the geocentric coordinate system and its different realizations used in geodetic practice; the definition of a horizontal geodetic datum (reference ellipsoid) and its positioning and orientation with respect to the geocentric coordinate system; positions on a horizontal datum and errors inherent in the ...
Petr Vaníček, Robin R. Steeves
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DETERMINATION OF A LOCAL GEODETIC DATUM FROM ASTROGEODESY
Survey Review, 1980Abstract 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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BACK TO BASICS (7) CHANGE OF GEODETIC DATUM
Survey Review, 1997Abstract 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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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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Geodetic datum transformation to the global geocentric datum for seas and islands around Korea
Geosciences Journal, 2005According 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 ...
Tae-Suk Bae +4 more
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Orientation of the Australian Geodetic Datum [PDF]
Australian Surveyor, 1970 J. G. Fryer, R. S. Mather
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Height datum definition, height datum connection and the role of the geodetic boundary value problem
Bulletin Géodésique, 1988Vertical datum definition is identical with the choice of a potential (or height) value for the fundamental bench mark. Also the connection of two adjacent vertical datums poses no principal problem as long as the potential (or height) value of two bench marks of the two systems is known and they can be connected by levelling.
Teunissen, Peter, Rummel, R.
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A MODEL FOR A FOUR-DIMENSIONAL REGIONAL GEODETIC REFERENCE DATUM
Survey Review, 1997AbstractA model for the establishment of a four-dimensional regional geodetic reference datum is presented. Starting from the three-dimensional integrated geodetic network model, formulations for the establishment of a four-dimensional regional datum are developed.
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Review of the Classical Methods for the Determination of Geodetic Datums
International Astronomical Union Colloquium, 1975In conventional geodetic systems, locations of points on the surface of the Earth may be defined either by means of natural (astronomic) or geometric gepdetic cooprdinates. 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 ...
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Reference Systems, Reference Frames, and the Geodetic Datum
2008Unambiguous reference systems are a fundamental requirement for accurate and reliable geodetic products. The definition of the reference system, the realization by a reference frame, and the allocation of the geodetic datum have to be strictly coherent.
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