Istitute of Sensing & GIS, Peking University Military Transportation University Bejing LongRuan Technologies
Inc. Guangdong Hongda Blasting Co. , Ltd.

煤矿常用1∶2 000和1∶5 000比例尺的井上下对照图,这2套比例尺的图形要素基本一致,只是表达方式与内容取舍有所不同。为了改变传统的需要人工判断、分别填绘2套图形等繁琐的工作方法,利用Longruan GIS 3.2平台的功能和数据,研究了井上下对照图比例尺自动转换算法以及点、线实体拓扑关系建立、线实体点坐标抽稀、注记符号分层显示等问题,开发实现了比例尺自动转换的功能模块。经过在煤矿实际应用,结果表明:该算法效果良好,提高了技术人员的制图效率。

Coal mine ground and underground contrast maps were generally both 1 : 2 000 and 1 : 5 000 scales, applying to different application requirements. Th e graphics elements of different scales were basically the same, but the trade- offs of expression and content of the map features were different. The traditional method was complicated which required users draw different maps by their own knowledge. Based on the data and functions of Longruan GIS 3. 2 platform, we had posed the i dea that different scale maps could be automatically converted based on the topological relationship of point, line and rarefying of line, symbol layering in this paper. At last, we achieved scale automatic conversion function on GIS platform. The practical application proved the method was good, efficient and helpful for mapping the coal mine ground and underground contrast maps.

国家科技重大专项资助项目(2011ZX05040-005-011)；