River streamline generation method, terminal equipment and program product

The invention discloses a river streamline generation method, a terminal device and a program product, which automatically discriminates and draws single and double linetypes according to river closed vector data in land survey data, changes the traditional drawing operation mode and improves the drawing efficiency. A computer program is adopted to automatically draw river mainstream names and flow direction symbols according to set intervals, and the requirements of mapping specifications are met. According to the method, the problems of large workload and low efficiency of river single and double line types, river names and flow direction judgment in current manual drawing of the land type topographic map are solved. 本发明公开了一种河流线型生成方法、终端设备及程序产品，依据国土调查数据中的河流闭合矢量数据自动判别绘制单双线型，改变了传统绘图的作业方式，提高了绘图效率；采用计算机程序自动按设置的间隔绘制河流主流名称以及流向符号，满足成图规范要求。本发明解决了目前人工绘制地类地形图中河流单、双线型、河流名称以及流向判断的工作量大、效率低的问题。