基于RS和GIS的黄河三角洲主要人工地物时空特征分析
徐鹤,侯西勇,李东,韩美,刘玉斌,王晓利,樊超

Analyzing Spatio-temporal Characteristics of Main Artificial Features in the Yellow River Delta based on RS and GIS
He Xu,Xiyong Hou,Dong Li,Mei Han,Yubin Liu,Xiaoli Wang,Chao Fan
图4 2000年、2015年黄河三角洲道路密度空间趋势图
Fig.4 Spatial trend of road density in the Yellow River Delta in 2000 and 2015