GIS的大比例尺数字测图方法分析与改进

Analysis and improvement of large scale GIS-oriented digital mapping

分析比较了目前城市大比例尺数字化测图中的两种主要方法的优缺点,即电子平板法与全站仪配草图法。为实现数字化地形图中不连续线、面状符号及复杂线状符号向GIS的自动化导入,针对电子平板法提出了基础线的概念。对全站仪草图法,提出在全站仪上加挂微型计算机,并用常规摄像方法代替草图。还对测量用三角架、预埋棱镜测量及测量控制点提出了改进设想。

This paper analyzes the advantages and shortcomings of the two main methods of present digital mapping;electronics plate and total station combined with draft. For the auto-entery of discontinuous lines, polygon symbols and complex linear symbols in digital terrain map into GIS, the concept of base-line is put forward referring to the method of electronics plate. As to the method of total station combined with draft, the total station integrated with a mini-computer and a CCD instead of draft are suggested. Besides, some innovation ideas are introduced for the improvement of tripod, pre-set lens and controlling point.