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Abstract: In order to create a flight plan precisely and reduce the overload of controller, a#br# novel method of central trajectory extraction based on computational geometry is proposed.#br# Firstly, a 3D point cloud model is generated from the radar data, and then a set of sampling points#br# is calculated through an adaptive sampling method along the flight direction. The graph which is#br# established from the sampling points is optimized in the next step. Finally, the central trajectory#br# curve is generated by uniformization and smooth processings successively. Experiments on real#br# data demonstrate that the proposed method can accurately extract the central trajectory of#br# trajectory cluster in terminal area, and recognize the feature points efficiently. Meanwhile, the#br# proposed method is robust.#br# Key words: terminal area; trajectory cluster; central trajectory extraction; computational#br# geometry
