Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Comparison of Various Gridding Methods
Abstract A comparison of various gridding procedures is carried out using a model gravity field. This model is produced by a causative body of 64 rectangular prisms, for which exact field values can be calculated everywhere. The following methods were used in the comparisons: kriging, linear interpolation along the shortest chord, least squares approximation with normal vector, surface fitting under tension, Franke’s local thin plate spline, least squares collocation, collocation with empirical covariance function and interpolation of scattered data by Franke’s weights. Two different input data sets, consisting of 800 and 480 randomly distributed points were used in the tests. For each method, computed values on a 4 km grid (676 points) were generated for comparisons. The results of the investigations show that simple numbers such as presented in the tables are not sufficient for critical comparison of the various gridding algorithms but contour maps of output are needed.
Comparison of Various Gridding Methods
Abstract A comparison of various gridding procedures is carried out using a model gravity field. This model is produced by a causative body of 64 rectangular prisms, for which exact field values can be calculated everywhere. The following methods were used in the comparisons: kriging, linear interpolation along the shortest chord, least squares approximation with normal vector, surface fitting under tension, Franke’s local thin plate spline, least squares collocation, collocation with empirical covariance function and interpolation of scattered data by Franke’s weights. Two different input data sets, consisting of 800 and 480 randomly distributed points were used in the tests. For each method, computed values on a 4 km grid (676 points) were generated for comparisons. The results of the investigations show that simple numbers such as presented in the tables are not sufficient for critical comparison of the various gridding algorithms but contour maps of output are needed.
Comparison of Various Gridding Methods
Nagy, D. (Autor:in) / Franke, R. (Autor:in) / Battha, L. (Autor:in) / Kalmár, J. (Autor:in) / Papp, G. (Autor:in) / Závoti, J. (Autor:in)
1999
Aufsatz (Zeitschrift)
Englisch
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