Abstract
The data organization of gravitational field is based on a form of Grid, which is similar to the data structure of DEM in the terrain. So this paper proposes a method of gravitational field analysis for extracting features by adopting some spatial analysis means of topography. First of all, the gravity anomaly data is used to calculate the roughness features of gravitational field. after comparing and anglicizing the features, roughness features are selected as the feature factor of gravity. Then, the method of calculating contour lines is applied to calculate region segmentation of roughness features and extract the vector edge of the larger feature regions, and clustering analysis to these contour of the region. At last, the scope line for Convex Hull of the region is calculated by the Convex Hull algorithm, and so as to obtain a more prominent region (matching region) that have significant changes in gravity anomaly, which provide the necessary reference data for the gravity-aided inertial navigation.
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