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一、前言如何充分发挥航片上的信息作用,提高森林资源调查的精度和速度,应是林业遥感当前研究的主要课提之一。根据目前情况,不可能随时都可以取到当年新摄制的航空象片进行森林资源调查。因此,当前如何使用这些旧的航空象片,是需要研究的关键。本文对上述二个间题进行了初步试验,利用不同年度摄制的航空象片判读的信息,配合少量的地面工作,采用不等概的抽样调查方法,对调查地区的总体及小班蓄积进行了估测。本次试验是在黑龙江省东北林学院帽儿
I. Preface How to give full play to the role of information on aerial photos to improve the accuracy and speed of forest resources survey should be one of the main research topics in forestry remote sensing. According to the current situation, it is impossible to obtain the newly-produced aerial photo of the year for forest resource investigation at any time. Therefore, how to use these old aerial photos at present is the key to be studied. In this paper, preliminary tests are conducted on the above two questions. Based on the information read by aerial photographs taken in different years and with a small amount of ground work, an unequal sampling survey method is used to assess the overall and small-scale accumulation in the surveyed areas Measurement. This test is in the Northeast Forest College in Heilongjiang Province cap children