Study of the Measurement Methods and the Precision of the Factors of the Nondestructive Standing Tree of the Total Station

This article proposes a new measurement method to solve the problems of great destruction, high cost, and low efficiency in traditional forestry investigation. This method is to, firstly, measure the diameters of trees at the breast height and the ground height, and then to measure the upper diameter and the relevant height of standing trees via the approximate section method of analytic cut trees. Then the timber volume is obtained through measurement volume method based on the simulation of summation of conical frustum. Also, the total station embedded operation software is developed using C # language, and the intelligent measurement is realized so as to calculate the diameter, the height, and the volume of the trees. There are 28 sample trees selected in Pinggu District of Beijing and monitored by total station. Next the sample trees are cut down, with their height and timber volume measured through conventional measurement volume method, and the measurements are regarded as truth value. Finally, the data is compared with that obtained by traditional method. The result shows that the average relative error of measuring the height of trees by total station standing timber volume compares with analytic cut trees is -0.83%, the average value of the relative error is 0.85%. As for the volume of timber, the average relative error is 1.58% while the average value of the relative error is 1.79%. Also, this study provides an efficient method for forestry workers to meet the requirement for the accuracy of forestry investigation.