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Research of Interpolation Methods for Area Elevation Anomaly

SHEN Jing-xiang,WANG He,LANG Gang,CHEN Ping-chuan AVIC Institute of Geotechnical Engineerig,Beijing,100098  
This paper introduces some fitting methods of elevation anomaly.Through a specific example,the method of polynomials fitting method is used to approach the surface of elevation anomaly in a small area,2km 2km;through further analyzing,the fitting method of five parameters polynomials is adopted and it proves that it can reach the precision of 3.8cm by testing the fitting with some data acquired by GPS leveling.Based on these,analysis of elevation anomaly regular grid network interpolation is summarized and several interpolation methods are carried out by writing MATLB program.
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