复照制版是把绘图工作由手工业式进展到采用机械的一种方法。它的工效最高、成本最低,在绘图作业方面,乃是一大革新。这一革新,在国内是由南京市房地产管理局测绘大队首创,他们最初使用於五百分一至一千分一地籍分丘图,比较摹绘提高效果十七倍。我会测量总队本年五月组织了参观学习,初步了解到一些有关复照制版的工作概要以及和手工绘图在经济上工效上的比较。现仅就所搜集之材料略述如後: —、概要复照制版就是改摹绘为照像。一切地形原图都可用照像办法,先制成玻璃版,再用抽气晒版机制成锌版,然後可任意印成透明蜡纸图或道林纸图。所不同者,普通照像用乾版,这是用湿版,底片随用随制,不可过乾,也不可过湿,必须湿润合度。原来摹绘目的,祗要求得到一张透明底稿,以供蓝晒或印刷,但工效很慢。如小比例尺的地形图,技 Duplicate plate-making is a way of moving from manual to mechanical. It has the highest efficiency and lowest cost and is a major innovation in drawing operations. This innovation, pioneered by the Nanjing Real Estate Administration’s Survey and Mapping Brigade in the country, was initially used on a cadastral map of 500-1,000, making 17 times more effective than copying. I will measure the Corps in May this year, organized a tour of learning, preliminary understanding of some of the complex overview of the work and manual drawing and the economic efficiency of the comparison. Now only on the collection of materials outlined below: -, Synopsis copy plate is to copy painted as a photo. All terrain original photos available camera approach, the first made of glass, and then into the machine into the gas version of zinc plate, and then can be printed on any transparent waxed paper or Tao Lin paper map. The difference is that ordinary photographic dry version, which is using a wet version of the film with the use of the system, not too dry, it can not be too wet, it must be wet fit. The original purpose of the painting, only asked for a transparent manuscript for the blue sun or printing, but slow work efficiency. Such as small-scale topographic maps, technology