A method and system for adjusting the track of airborne LiDAR depth sounding without control conditions

Abstract

The application belongs to the technical field of depth measurement, and provides a flight strip adjustment method and system for airborne LiDAR depth measurement without control conditions, which has the technical scheme of extracting an overlapping area between flight strips, limiting a point-surface matching range; determining approximate homonymic points by constructing a triangular net and point matching of adjacent flight strips, establishing a connection between the flight strips, optimizing the matching by using a RANSAC algorithm, constructing a regional net flight strip adjustment model, and solving a best transformation matrix of the flight strip; expressing a complex terrain by using a polynomial curved surface, calculating correction values of each point according to a point-surface matching distance and minimum solved polynomial coefficients, and correcting the correction values. The application takes airborne LiDAR depth measurement data as a data basis, and after the flight strip adjustment model of the application is used for processing, the internal and external coincidence accuracy of the airborne LiDAR depth measurement data can be effectively improved, and an effective solution is provided for optimizing the quality of the airborne LiDAR depth measurement data without control conditions.

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