一种测量树高的简易方法需要准备的主要工具有：带刻度的软绳１根，大小适宜的氢气球１个（过大受树枝的阻碍升降不便），海拔仪及望远镜各１个。具体操作方法是：将软绳固定在氢气球的固定点上，绳的上端为零点。在无风的情况下，将氢气球放开，用软绳控制球的高度，使之... An easy way to measure tree height The main tools to be prepared are: 1 soft cord with scale, 1 hydrogen balloon of the right size (too large to be hindered by the branches), 1 for each of the altitude instrument and the telescope. The specific method of operation is: the rope fixed to the hydrogen balloon fixed point, the upper end of the rope is zero. In the absence of wind, the hydrogen balloon release, with a soft rope to control the height of the ball, so that ...