关键词: 多波束, 三维激光扫描, 数据时空融合, 船体坐标系, 无验潮, 水陆三维一体化测量系统

Abstract: In order to fast, accurately and comprehensively obtain land and river terrain, an integrated land and water three-dimensional measurement system is proposed. The system consists of some key technologies: data spatial-temporal fusion and the multi-sensor integration of 3D laser, multi-beam, fiber optic compass, GNSS and camera. This paper givers a systematical introduction to the general design scheme. It is proposed to use the ship hull and the design plan of other sensor base for accurately establishing ship coordinate system. It is also put forward to realize multi beam non-tidal bathymetry by high precision and high resolution gravity model that can reduce the tidal level error. By the new system, an integrated land and water measuring project was carried out for the Cuntan reach on Yangtze River, during which data acquisition, accuracy evaluation and result application were practiced, so the feasibility, reliability and accuracy of the new system are proved.

Key words: multi-beam, 3D laser scanning, data spatial-temporal fusion, ship coordinate system, non-tidal, integrated land and water three-dimensional measurement system