在农村搞民房建筑和小型农田建设及修乡间公路时,往往需要测定地面的高低差,俗称抄水平。若无经纬水平仪,可按下图自制一个简单的水平仪。据笔者在扶贫期间指导农民搞农田建设时所试,若使其缺口与准星的距离在1.2米左右,其测量精度可与市场上出售的经纬仪相媲美,但其造价还不足后者的1％,也便于操作。其具体作法是: 先用木棍做→个高约1.5米,横梁长约1.3米的 When building rural houses and small-scale farmland and repairing rural roads in rural areas, it is often necessary to measure the level difference of the ground, which is commonly known as copy level. If there is no latitude and longitude level, you can create a simple level by pressing the figure below. According to the author’s guidance during the poverty alleviation period when the farmers were instructed to carry out farmland construction, if the distance between the gap and the front sight is about 1.2 meters, the measurement accuracy can be comparable to the theodolites sold on the market, but its cost is less than 1% of the latter. , It is also easy to operate. The specific approach is: First use a wooden stick → about a height of 1.5 meters, a beam of about 1.3 meters