视差杆量测树高精度的探索

应用大比例尺航空像片,用视差杆量测树高,运用树高理论公式时,应采用样地树顶的横视差P_b值,有利提高计算树高精度。并提出3种简易方法求解P_b值。另外要根据不同的样地立地情况,采用相应的量测方法。这样根据试验表明,能获得非常好的量测精度,完全能满足林业调查技术要求。

Study on the Precision of Tree Height Measured with Parallax Instrument

The adoptability of the parallax instrument, the data obtained from the large-scale aerophotograph and the horizontal parallax Pb of tree top at sample plot can acquire the high precision of measuring tree height which fully meets technique requirement of forest inventory when the theory equation of tree height is applied. This paper puts forward three simple methods to solve Pb value, and the relevant measurement methods should be adopted according to different site conditions.