Ship-borne photogrammetry for river steep bank topographic survey by integrating digital camera and GNSS

Aiming at the problems of high operation risk and high cost of UAV remote sensing and ship-borne LiDAR technology in river steep bank topographic survey, a ship-borne photogrammetry method integrating consumer digital camera and GNSS was proposed.This method can realize automatic data acquisition with lasting endurance by networking sensors and PCs.By studying the self-calibration beam method and sensor calibration model, the fusion of digital image and GNSS data was realized, solving the dependence of mobile photogrammetry on control points or high-precision inertial navigation.By studying the degree of freedom elimination method in ship-borne image data processing, the 3D scene reconstruction of river steep bank was realized.The measurement results in the typical reaches of the Yangtze River showed that this method was reliable in accuracy, efficient in data acquisition, and highly automated in data processing.It can realize the integrated mapping of land and water, and has significant advantages such as low cost and easy operation.