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针对远海岛礁多为不可登岛,开展远海岛礁大比例尺测图难度大的问题,该文提出了利用GNSS浮标作为海上控制点,探讨GNSS浮标在海岛礁1∶2 000DOM生产中发挥的作用。采用长航时无人机获取试验岛礁高分辨率影像,在无人机常规航线并加摄构架航线的前提下,结合PPP技术,在海岛四周布设GNSS浮标的控制组合方式进行区域网平差和影像生产。试验结果表明,利用此种方法进行远海岛礁大比例尺DOM生产是切实可行的,精度基本满足海岛1∶2 000DOM生产精度要求,研究成果为远海岛礁1∶2 000DOM生产提供了一套合理的解决方案,为远海岛礁大比例尺测图提供参考。
In view of the difficulty in carrying out large-scale mapping of far-sea reefs for the remote islands and reefs, it is proposed to use the GNSS buoys as the control points at sea to explore the role of GNSS buoys in the production of 1: 2,000DOM of island reefs . Using long-haul unmanned aerial vehicle (UAV) to acquire high-resolution test images of reefs and islands, on the premise of conventional route of UAV plus aerial route of the structure, combined with PPP technology, the GNSS buoy control combination is deployed around the island to adjust the regional network And video production. The experimental results show that it is feasible to use this method to produce large-scale DOM in the far-sea reefs, and the accuracy can basically meet the production accuracy requirements of 1: 2,000DOM for islands. The research results provide a reasonable set of 1: 2,000DOM production for far- Solution for the far island reef large scale mapping provide a reference.