Jianjun CAO, Guoan TANG, Xuan FANG, Yongjuan LIU, Jiaming NA, Ying ZHU, Jinlian LI. Study on the Singularity Strength of Topographic Anisotropy of Loess Tableland, Ridge, Hill in Loess Plateau based on Terrain Profile [J]. Journal of Geo-information Science, 2020, 22(3): 442