AO编写的对比两个图层中有重叠的feature，以及重叠的面积。-AO prepared by the contrast with two layers of overlapping feature, and the overlapping area.

ArcGIS This sample illustrates how to create custom animations in ArcGIS Desktop. This sample implements a layer effects animation type for ArcMap. It allows you to animate through layer brightness and contrast. Note that this animation would only wo