Comparison on Mobile Gravity among Different Spatial Interpolation Methods

doi:10.13474/j.cnki.11-2246.2017.0308

Abstract

Abstract: The mobile gravity is an important indicator for seismic monitoring,which is essential to obtain the spatial distribution characteristics and makes up for the lack of data obtained by spatial interpolation.In this paper,we used three kinds of interpolation methods which included spherical Kriging,inverse square distance and improved Shepard to interpolate mobile gravity,meanwhile,the results were analyzed from data distribution,the number of interpolation points,interpolation resolution and search radius(search points) and verified.The results showed several meaningful conclusions,which mainly contained three aspects as follows.①Compared with spherical Kriging,inverse square distance and improved Shepard achieved better results for the interpolation of mobile gravity,nevertheless,Kriging produced well-continuity and high-smoothness results when there is less outliers and less difference in sample.②The selecting of an appropriate resolution need to according the distribution of sample points and interpolation range in mobile gravity interpolation process.③It is overwhelmingly significant to comprehensively consider the geophysical tectonic characteristics and spatial correlation and variability in the earth element interpolation.

Key words: mobile gravity, spherical Kriging, inverse square distance, improved Shepard

CLC Number:

ZHU Yu, WANG Wei, ZHANG Chuanyin, WANG Qingliang. Comparison on Mobile Gravity among Different Spatial Interpolation Methods[J]. 测绘通报, 2017, 0(10): 12-17.

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