Unmanned collaborative acquisition and processing method for overwater and underwater geographic space information of inland waterway

The invention discloses an unmanned collaborative acquisition and processing method for overwater and underwater geographic space information of an inland waterway. The method comprises the following steps: step 1, extracting weak texture information of a waterway improvement building of a measured image and segmenting and extracting boundary lines of waterway boundaries on both sides of an inland river; 2, measuring the global topography and landform of the inland waterway, and synchronously collecting underwater topographic data and sonar images; step 3, obtaining underwater acoustic point cloud data; and 4, carrying out digital reconstruction on the inland waterway multi-source geographic space information, and constructing a live-action three-dimensional scene and visual presentation of overwater and underwater information of the inland waterway and the waterway improvement building. The method solves the problem that the damage of the channel improvement building has concealment and suddenness, enables t