一览图 meaning in English

general chart
general map
general-purpose map

Figure 4 : risk reduction profiles for waterfall and iterative development projects
图4 ：瀑布和迭代开发项目的风险消减一览图。
A polar projection of half or more of the celestial sphere on a chart equipped with an adjustable overlay to show the stars visible at a particular time and place
星座一览图天体球的一半或多半在平面图上的极投影图，这种图具有可调节的遮蔽物以显示在给定时刻和位置可见的恒星