Taking a hydropower station project as an example, experiments were conducted on UAV 4D aerial photogrammetry prod-ucts, the production of 4D aerial photogrammetry products of UAVs was completed, and the relevant technical indicators were analyzed strictly with respect to error analysis and accuracy, and it was proved that the differential POS was obtained by using the high-preci-sion post-differential GNSS/IMU technology (PPK). Under the condition of more sparse ground image control points, aerial photo-grammetry 4D products that meet the specifications can be produced, thereby improving work efficiency, greatly reducing the labor in-tensity of operators, and shortening the project cycle.
维普
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