Reduction of distortion and improvement of efficiency for gridding of scattered gravity and magnetic data
Zhang Chen1,2,3, Yao Chang-Li1,2,3, Xie Yong-Mao1,2,3, Zheng Yuan-Man1,2,3, Guan Hu-Liang1,2,3, and Hong Dong-Ming1,2,3
1. State Key Laboratory of Geological Process and Mineral Resources, Beijing 100083, China.
2. Key Laboratory of Geo-detection, Ministry of Education, Beijing 100083, China.
3. School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China.
Abstract This paper presents a reasonable gridding-parameters extraction method for setting the optimal interpolation nodes in the gridding of scattered observed data. The method can extract optimized gridding parameters based on the distribution of features in raw data. Modeling analysis proves that distortion caused by gridding can be greatly reduced when using such parameters. We also present some improved technical measures that use humanmachine interaction and multi-thread parallel technology to solve inadequacies in traditional gridding software. On the basis of these methods, we have developed software that can be used to grid scattered data using a graphic interface. Finally, a comparison of different gridding parameters on fi eld magnetic data from Ji Lin Province, North China demonstrates the superiority of the proposed method in eliminating the distortions and enhancing gridding efficiency.
This study was partly supported by the Public Geological Survey Project (No. 201011039), the National High Technology Research and Development Project of China (No. 2007AA06Z134) and the 111 Project under the Ministry of Education and the State Administration of Foreign Experts Affairs, China (No. B07011).
Cite this article:
ZHANG Chen,YAO Chang-Li,XIE Yong-Mao et al. Reduction of distortion and improvement of efficiency for gridding of scattered gravity and magnetic data[J]. APPLIED GEOPHYSICS, 2012, 9(4): 378-390.
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