A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A functioning verification 2D geodetic points
2D geodetic points for the geodetic use should be compatible each other. The point compatibility presents the geometric coincidence of the material point of physical mark with the immaterial point given by the point coordinates C=[XY] in a plane system. Before the survey applications of points are made from a certain network area, it is necessary to prove their compatibilities. This demands for the determination of their present coordinates C’=[X’Y’] from the contemporary surveying and processing. Then, the coordinate discrepanties V=C-C’ can be acquired. Based on V and using covenient analytical procedures a decision on the compatibility of points, i.e. on the possibility of their application can be taken. The following methods are primarly the most suitable ones for the identification of uncompatible points: • statistic testing of covenient null hypotheses H0 for V • robust transformations and adjustments for the identification of points with a high V. From alalyses and application of these methods, it could be revealed their next main properties and utilities: • the null hypothesis H0 : V=0 (nonsignificant value of V) can be tested e.g. by the Lenzmann-Heck’s test (with the transformation), by Bill’s test(without the transformation) and by other testings. But testing procedure can not mostly identify two or more uncompatible points. • Robust estimations of type : Least Squares Method with the iterative reweighting facilitatesin the proofed area to identify more outliers, i.e. more uncompatible points. Illustrations of both methods is given by demonstrative examples.
A functioning verification 2D geodetic points
2D geodetic points for the geodetic use should be compatible each other. The point compatibility presents the geometric coincidence of the material point of physical mark with the immaterial point given by the point coordinates C=[XY] in a plane system. Before the survey applications of points are made from a certain network area, it is necessary to prove their compatibilities. This demands for the determination of their present coordinates C’=[X’Y’] from the contemporary surveying and processing. Then, the coordinate discrepanties V=C-C’ can be acquired. Based on V and using covenient analytical procedures a decision on the compatibility of points, i.e. on the possibility of their application can be taken. The following methods are primarly the most suitable ones for the identification of uncompatible points: • statistic testing of covenient null hypotheses H0 for V • robust transformations and adjustments for the identification of points with a high V. From alalyses and application of these methods, it could be revealed their next main properties and utilities: • the null hypothesis H0 : V=0 (nonsignificant value of V) can be tested e.g. by the Lenzmann-Heck’s test (with the transformation), by Bill’s test(without the transformation) and by other testings. But testing procedure can not mostly identify two or more uncompatible points. • Robust estimations of type : Least Squares Method with the iterative reweighting facilitatesin the proofed area to identify more outliers, i.e. more uncompatible points. Illustrations of both methods is given by demonstrative examples.
A functioning verification 2D geodetic points
Jana Sabová (author) / Vincent Jakub (author)
2005
Article (Journal)
Electronic Resource
Unknown
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