Research on the Estimation of Growing Stocks by Using Large Scale Aerial Photos to Measure Tree Height

In this paper, the correlability between measurement of tree height in the lab. and in the field was explored by combining the plots of the aerial photo with a scale of 1:2200 with the field plots. The result shows that the correlation coefficient has reached over 0.8, so the measurement of tree height in the field can be replaced by the measurement in lab. instrument to measure the tree height in lab. to estimate the growing stock of the whole bureau, the accuracy was 81.84%. However, we conducted a combining estimation of the growing stock of the whole bureau by using the plot stock measured in lab. and the last plot stock in the field. The accuracy was 85.81%.In order to reduce the field work and make full use of the previous material, a beneficial approach was conducted.This is another useful method for carrying out forest management inventory or forest operational inventory.