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大家都知道地形图是经过测量,按照地面上一切静物(如房屋道路等)画出来的,一般的画法是由导线(或三角纲)定出基线的方向和距离。用水平定出基线上各点的高度,再从基线上按方位角(或直接角)和距离测定地面上各种不同的静物的位置,按照比例尺缩绘到图纸上,最后把等高线画出,显示出来地面的起伏情况,便构成了地形图。地质图是表示地面上的地贸情况的图,地面上各种岩石的分布和结构。经过
As we all know, topographic maps are measured and drawn according to all the still life on the ground (such as houses and roads). The general method is to set the direction and distance of the baseline by wires (or triangles). Use the horizontal to set the height of each point on the baseline, and then from the baseline by azimuth (or direct angle) and distance determination of the ground on a variety of different still life position, according to the scale down to the drawing, and finally the contour painting Out, showing the ups and downs of the ground, it constitutes a topographic map. Geological map is a map showing the trade situation on the ground, the distribution and structure of various rocks on the ground. after