小型无人机低空摄影测量在土地确权应用中的探究——以陕西试点区域为例

Application of Small UAV Low Altitude Photogrammetry in Rural Contracted Management of Land:Taking Shannxi Pilot Area as An Example

低空摄影测量具有成本低、效率高、时效性强、周期短、灵活性强的优点,能够高效率地获取高分辨率的影像,从而对地表进行快速、实时地调查和监测。以陕西三试点区域为例,应用小型无人机获取高分辨率影像,将此影像利用INPHO全数字摄影测量工作站中的Match AT光束法平差软件进行空三加密与计算,并利用航天远景Map Matrix立测软件进行基本定向点及检查点的精度检查,最终生成高精度的数字正摄影像底图。为了验证此无人机低空摄影测量的时间效率和结果精度,首先将此数字正摄影像底图的精度与传统航测法土地确权的精度指标进行比较与分析,得出此小型无人机低空摄影在土地经营权确权中具有很强的可行性与实用性,然后选用特定数量的影像数量重复执行此工艺过程并对过程进行时间统计,从而在总体工作量很大并保持稳定的情况下,验证了此无人机低空摄影在时间效率上的高效性,最后选用空三完成后影像上明显加密点坐标与实际量测坐标进行比较,得出结果精度满足较大比例尺的测绘成图。

Low-altitude photogrammetry has the advantages of low cost,high efficiency,strong timely effectiveness,short cycle,gosd flexibility,and is able to obtain high-resolution images with high efficiency,thus ready to conduct fast and real time investigation and monitoring of the land surface Taking three pilot regions in Shannxi as an example,high-resolution images were obtained with small UAV. Using bundle adjustment Match AT aerial triangulation encryption software in INPHO digital photogrammetric station these images were computed.Using the soft ware of space vision Map Matrix the accuracy of the basic orientation point and checkpoints were cheched,the high-precision digital photography was obtained. In order to test the precision of this digital photography it was compared with the aerial land ownership in accuracy. The result is that UAV low altitude photography is of good feasibiliy and practicality in land management rights.