说明：  SVG元素的功能很好的帮助了我们实现这个功能。由于在界面上我们有很多辅助内容，所以只能分出一部区域用来显示地图
(SVG elements function very well helped us achieve this function. The interface because we have a lot of auxiliary content, so the separation of a region can only be used to display map)