所谓的鹰眼，就是一个缩略地图，上面有一个矩形框，矩形框区域就是当前显示的地图区域，拖动矩形框可以改变当前地图显示的位置，改变矩形框的大小，可以改变当前地图的显示区域大小，从而起到导航的作用。
鹰眼是地图浏览中常用的功能之一(The so-called eagle eye, is a thumbnail map, there is a rectangle, rectangle region is currently displayed map area, dragging a rectangle can change the current map showing the location of the change of the rectangular box size, can change the size of the current map display area, and thus play a role in navigation.
Hawk Eye is one of the most commonly used functions in map browsing)