基于南方CASS3D大比例尺数字线划图的成图方法探讨

Discussion on the method of large scale digital line graph based on South CASS3D

在数字测图中,数字线划图(DLG)是最为常见的产品之一,而南方CASS作为生产数字线划图的生产软件,得到了测绘人的广泛认可,本文从大比例尺地形图的生产角度出发,在航空摄影测量空三成果的基础上,利用南方CASS3D测图软件,探讨了内业数据处理、数字成图技巧及二三维窗口联动的综合使用等,实现了数字线划图快速、高精度成图效果,提高了作业效率,降低了生产成本,进一步拓宽了航空摄影测量成果的全面深化应用,可作为大比例尺数字线划图的生产案例,加以推广。

In digital mapping,digital line graph(DLG)is one of the most common products,and South CASS,as the production software of digital line mapping,has been widely recognized by cartographers.From the perspective of largescale topographic map production,based on the three achievements of aerial photogrammetry,using South CASS3D mapping software,this paper discusses the internal data processing and the technique digital mapping and the comprehensive use of two or three dimensional window linkage can realize the fast and high-precision mapping effect of digital line drawing,improve the operation efficiency,reduce the production cost,further expand the comprehensive and deep application of aerial photogrammetry results,and can be used as a production case of large-scale digital line graph for promotion.