无人机DEM测点插值算法的矿区沉陷测绘技术

Mining subsidence mapping technology based on UAV DEM survey point interpolation algorithm

摘要:

为实现对矿区沉陷深度的精准测量，完善测绘技术的具体实施方案，针对无人机DEM测点插值算法的矿区沉陷测绘技术展开研究。根据DEM测点获取结果，实施分维值测定处理，再以此为基础，确定插值拐点所处区域，实现对无人机DEM测点插值算法应用流程的完善。联合像控点布设原则，定义空中三角区域，并通过推导径向插值基函数的方式，建立矿区沉陷区域的地理模型。在空间坐标系转换条件的基础上，确定矢量数据叠加的处理结果，再结合像片倾角与旋偏角的实际取值，求解测量精度评价指标，完成无人机DEM测点插值算法的矿区沉陷测绘技术实施方法的设计。实验结果表明，上述测绘技术方法作用下，沉陷深度测量结果与矿区真实沉陷深度之间的差值不超过1m，符合精准测量的应用需求，对于测绘实施方案的完善可以起到一定的促进性影响作用。

Abstract:

In order to realize the accurate measurement of the mining subsidence depth and improve the specific implementation plan of the surveying and mapping technology, the mining subsidence surveying and mapping technology based on the UAV DEM survey point interpolation algorithm is studied. According to the results of DEM measurement points, the fractal dimension value is measured and processed, and on this basis, the region of the interpolation inflection point is determined, so as to improve the application process of the UAV DEM measurement point interpolation algorithm. Combined with the principle of photo control point layout, the air triangle area is defined, and the geographic model of mining subsidence area is established by deriving the radial interpolation basis function. On the basis of the transformation conditions of the spatial coordinate system, the processing results of vector data superposition are determined, and then combined with the actual values of the dip angle and rotation angle of the photograph, the measurement accuracy evaluation index is solved, and the design of the implementation method of the mining subsidence mapping technology of the UAV DEM measurement point interpolation algorithm is completed. The experimental results show that the difference between the settlement depth measurement results and the actual settlement depth of the mining area is not more than 1m under the effect of the above surveying and mapping technology, which meets the application requirements of accurate surveying and can play a certain role in promoting the improvement of the surveying and mapping implementation plan.