西藏雅鲁藏布江中游河谷地区1830年耕地格局重建

王宇坤, 陶娟平, 刘峰贵, 张镱锂, 陈琼

Reconstruction of cropland spatial pattern in 1830 in the middle reaches of Yarlung Zangbo River Valley

Yukun WANG, Juanping TAO, Fenggui LIU, Yili ZHANG, Qiong CHEN

表2 坡向量化标准

Tab. 2 Quantification of aspect

坡向(°) 270~360 180~270 0~90 90~180 量化值 1 2 3 4