实现了对地图图层的放大、缩小、漫游、全图功能，是用AE的二次开发，很实用-Realize the map layer amplification, narrow, roaming and map function, is to use AE of secondary development, very practical

实现了对地图图层的操作，是基于ArcEngine的二次开发，是学习AE的基础-Operation of map layers, based ArcEngine secondary development, learning AE