基于google api 地图显示，实现拉框显等功能-Google api map-based display, pull box significantly functions

delphi在线使用google地图，可以使用google的多种地图模式。前提条件是 你允许连上google-Delphi online using Google maps, you can use a variety of maps Google model. The prerequisite is that you are allowed to connect to the Google