等时线图 meaning in English

time-contour map

Secondly , combining practical survey method and time - resistance mathematic model , the author obtained average time distance from every time - cell to fictitious time center , isotime curve figure ( by arc view 3d analyze ) and temporal shape
然后利用实际测量法和理论公式法计算出深圳特区各时间单元的平均时间距离，并用arcview中的3d分析模块自动生成等时线图。