一、应用范围和经济效益水文地質工程地質图件的绘制赶不上目前形势发展的需要,其主要原因之一是手工业方式生产,不能很好的結合目前已有的机械設备条件。例如在同一地区須编制各种地質图时,就多次清绘同一張地形底图(一般6～8次)。其次成图一般是薰图但底不白,线条不清,給着色带来一定的困难,这些都影响了工作效率和质 I. Application scope and economic efficiency The drawing of hydrogeology and engineering geological maps cannot keep up with the current situation. One of the main reasons is the production of handicrafts, which can not be combined well with the existing mechanical equipment conditions. For example, when a variety of geological maps are to be prepared in the same area, the same topographic map (generally 6-8 times) is cleared several times. Secondly, the drawing is usually a map but it is not white and the lines are not clear, which brings certain difficulties to coloring. All these affect the work efficiency and quality.