多年冻土工程地质制图的阶梯发展

张中琼, 林芳, 吴青柏, 张泽, 张鹏

Stepwise development of the engineering geological mapping in permafrost regions

Zhongqiong ZHANG, Fang LIN, Qingbai WU, Ze ZHANG, Peng ZHANG

图4 1∶25万不同样点数青藏高原工程走廊冻土分布制图

Fig.4 Mapping （1∶250 000） of permafrost distribution with different points along the Tibetan Plateau engineering corridor in 2002 and 2012