“地质与勘探”1958年第3期刘宝林同志所介绍的用量角器简便上图的方法是值得学习的.地质工作者在野外测图时,在图上给定向线的机会是很多的,例如给岩层产状,作路线地质图及图上定点等,若用罗盘来作图,工作效率非常低,用量角器上图是提高野外工作效率的方法之一.为使此法更趋完善,避免一些可能的误差,现将在实际工作中的几点体会和经验,作为该文的补充意见,提供大家参考.1.此法的特点是将量角器的直边(即半圆规的底边)作为量角度用,也作直尺用,故作图时就利用此直边划直线.但市上一般的透明量角器的直边(附图CD)并非就是半圆规上通过圆心的底边(附图AB),AB与CD线只是大体上平行的,故所作的图就会有误差,这问题曾在作闭合导线时才被发观,后经检查 “Geology and Exploration ” 1958 No. 3 Comrade Liu Baolin introduced the use of protractor simple on the map method is worth learning.Geological workers in the field mapping, given the direction of the line on the map there are many opportunities, For example, to the rock formation, geological map for the route and the fixed point on the map, if the compass for mapping, the work efficiency is very low, with the protractor on the map is to improve the work efficiency of the field.To make this law more perfect, To avoid some possible errors, now in the actual work of a few experiences and experience, as the text of the supplementary comments, for your reference .1 This method is characterized by the protractor straight edge (ie semicircular bottom) As the amount of angle, but also for the use of ruler, so the use of this straight line when drawing the straight line.But the general public transparent protractor straight edge (Figure CD) is not the semicircular through the center of the bottom edge Figure AB), AB and CD line is only roughly parallel, so the diagram will be made of the error, which was closed when the wire was made only when the inspection, after inspection