航空摄影生产南方沿海1∶2000地形图关键技术研究

Key techniques of 1∶2000 topographic map production for southern coastal area using photogrammetry

采用航空摄影测量制作南方沿海1∶2000地形图时,常遇到水雾较重导致影像质量降低、控制加密选点困难和经济发达街区密集导致测绘工作量大等问题。本文以中山市为例,系统分析了航空摄影、控制测量、空三加密、DEM、DOM、DLG制作等关键环节中的技术问题,提出了适合实验区特点的技术路线。实验表明,所提技术路线能够较好地解决生产中的问题,产品精度满足测图要求,研究成果对南方沿海其他地区具有一定的参考价值。

There are some usual problems in mapping the southern coastal topographic map of 1 ~ 2000 scale, such as image quality reduction because of the heavy fog, the difficulty of control points and pass points selection, and the heavy workload for the intensive streets. In this paper, the techniques in the key steps of aerial photograph, control surveying, aerial photo triangulation, and DEM, DOM, DLG production were analyzed systematically, and then a technological route suited for the experimental areas were proposed by taking Zhongshan as an example. It was shown by the experimental results that the proposed route could solve the problems in production with high precision. The research result would provide a reference for other coastal areas.