黄河流域旅游高质量发展空间差异、重心演化及优化路径

邬超, 周成, 杨兆丰, 刘亚玲, 郑涵夫

Spatial difference， focus shifting and optimization of high-quality tourism in the Yellow River Basin

Chao Wu, Cheng Zhou, Zhaofeng Yang, Yaling Liu, Hanfu Zheng

图2 2017—2021年黄河流域旅游高质量发展标准差椭圆 注：基于自然资源部标准地图服务网站标准地图（审图号：GS（2019）1822号）制作，底图边界无修改

Fig.2 Standard deviation of high-quality development of tourism in the Yellow River Basin from 2017 to 2021