摘要
本文用我国自行拍摄的1:2 200比例尺的黑白航片,与地面样地配合,研究了室内仪器测高与实测高的相关关系。结果表明相关系数可达0.8以上,可用其在某些调查中代替实测。用室内仪器测高估测全局畜积量,其精度为81.84%,如用航片和野外两期样地对全局蓄积量进行联合估计,估测精度为85.81%。这些为在森林调查中减少地面工作量和利用已往资料,进行了有益的探索。为进行森林经理调查(二类调查)乃至伐区调查又辟出了一条可循之径。
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.
出处
《林业科学研究》
CSCD
北大核心
1991年第2期122-127,共6页
Forest Research
关键词
森林
蓄积
估测
大比例尺
航片
forest investigation
estimation of growing stock
large aerial photos