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今年西藏使用的航空象片比例尺平均为1/100,000左右。我们没有用过这么小的比例尺象片进行判读。通过对西藏森林分布规律的深入了解,加强对判读人员的训练和实际判读,摸索到一些方法,取得了一点经验。一、测树因子的判读(一)优势树种组和令组的判读1.优势树种组划分为三个树种组:云杉、松类和阔叶树,其判读特征如下。
The average scale of aerial photographs used in Tibet this year is about 1 / 100,000. We have not used such a small scale image interpretation. Through in-depth understanding of the law of the distribution of forests in Tibet, strengthening the training and practical interpretation of interpreters, some methods have been explored and some experiences gained. First, the interpretation of measuring tree factor (A) the dominant tree species and the interpretation of the group 1. Dominant species group is divided into three tree species: spruce, pine and broadleaf tree, the interpretation of the following characteristics.