The Spatial Characteristics of a Line and Their Application to Line Simplification

This paper discusses the spatial knowledge related to a line,and the characteristic points of lines is detected.According to the requirements of line generalization,new algorithms for identifying characteristic line points are presented.These characteristic points are used to improve the algorithms of line generalization.An algorithm for identifying bends is shown.In this paper,improved algorithms based on those by Douglas-Peucker,Visvalingam and Whyatt are shown.In this test,the progressive process of line generalization is emphasized.     

运用AutoCAD绘制灰线定位检测图的几点经验

结合生产实践，简要总结了用AutoCAD绘制灰线定位检测图的过程与方法，并提出自己的经验。     

微机绘制矿井三维立体图的研究

本文在调查分析矿井三维立体图的特性的基础上，分析和运用轴测投影原理，阐述了消除巷道道隐藏线的方法。     

根据近景摄影测量的解析成果绘制中心投影图

本文提出了根据空间形体的三维坐标绘制中心投影图的解析基础和方法，既将近录摄影测量的解析成果转换中为心投影图，也适用于把设计的建筑物或空间形体转换为中心投影图，这种方法，对于研究造型艺术有广泛的应用价值。