naslovnica
ISSN: 0351-0271
e-ISSN: 1581-1328
COBISS.SI ID: 5091842
UDK: 528=863
Zveza geodetov Slovenije
Publisher:
Association of Surveyors of Slovenia
Zemljemerska ulica 12, SI-1000 Ljubljana
E-mail: info@geodetski-vestnik.com
CC

Ocena točnosti in primerjava metod interpolacij modelov geoida

Accuracy assessment and comparison of interpolation methods on geoid models

Author(s):

Marko Radanović, Tomislav Bašić

Abstract:

In this paper the accuracy of 6 spatial interpolation methods on geoid grid models are tested and compared: Inverse Distance Weighting, Kriging, Minimum Curvature, Natural Neighbour, Radial Basis Function and Moving Average. Grid models are derived from three global geopotential models: EGM2008, EIGEN-6C4 and GECO. Totally 18 geoid models in forms of equiangular grid models are created in GoldenSoftware Surfer 13 for this purpose, by combining 6 methods of interpolation and 3 global models, whose size and position cover a wide area of Croatia with parts of neighbouring countries. Default interpolation parameters were kept during the process. Models were created in a way that modelled values of geoid undulations can be subtracted from undulations of independent models in equal points. Residuals calculated in this way served as a base for quality assessment. Comparative analysis of quality indicators, statistics and graphical indicators of residuals led to a conclusion that the best-fitted methods of interpolation for this specific case are Radial Basis Function, Kriging, and Natural Neighbour, in that order.

Keywords:

geoid, geoid model, spatial interpolation, global geopotential model, interpolation, Croatia

DOI: 10.15292/geodetski-vestnik.2018.01.68-78

Citation:

Marko Radanović, Tomislav Bašić (2018). Ocena točnosti in primerjava metod interpolacij modelov geoida. | Accuracy assessment and comparison of interpolation methods on geoid models. Geodetski vestnik, 62 (1), 68-78. DOI: 10.15292/geodetski-vestnik.2018.01.68-78

ISSN: 0352-3551
EISSN: 1581-0267
COBISS: 3664386
UDK: (05) 532;556;626/628.6
Zveza geodetov Slovenije
Publisher:
Association of Surveyors of Slovenia
Zemljemerska ulica 12, SI-1000 Ljubljana
E-mail: info@geodetski-vestnik.com
CC