地图放大、缩小、漫游、几何运算、投影转换等简单功能-Map zoom, roam, geometric computing, projection conversion and other simple functions

AO实现投影批量转换，采用人性化模块管理的思想，操作简单易懂。方便用户来管理使用。-In order to adapt to modern enterprise management, enterprise investment of about three million building internal networks, to support the operation of ERP systems. Across the enterprise network Intracity two