我县山林普查队联系工作和生产实际,经过多次试验,试验成功了用幻灯放图的新方法,大大加快了山林普查工作进程。幻灯放图具有精度高,速度快,操作简便,易于推广学习的特点,同时也适应于农田、水利规划设计的放图工序。幻灯放图与过去采用的格网法和比例尺法相比较,具有很多优点。用格网法放图,一般每人每天只能放2万多亩,并且 My county mountain census team contact work and production of actual, after many tests, the successful trial of a new method of using slide show, greatly accelerated the process of mountain census. Slide with high precision, fast, easy to operate, easy to promote learning characteristics, but also adapted to farmland, water planning and design of the drawing process. Compared with the grid method and the scale method used in the past, the slide show has many advantages. With the grid method to put the map, generally only 2 million mu per day per person, and