在画桩考场地时，如采用目视直角法，常会使考试场地失真，增加学员考试的难度；如利用勾股定理计算法，不但费时，还需要带平方根表，也不方便。这里介绍一种只用皮尺画极考场地的方法，供参考。1.根据考试场地的地形，选取一点定为桩位①（如图），然后将皮尺起端置于①处， In drawing a test venue, such as the use of visual right angle method, often make the examination site distortion, increase the difficulty of student exams; such as the use of Pythagorean Theorem calculation method, not only time-consuming, but also with square root table, but also not convenient. Here is a description of only a tape measure to test the venue for reference. 1. According to the topography of the test site, select a point as a pile ① (Figure), and then put the ruler at the ① place,