Visual C++ 开发 GIS 与 GPS ，提供在线首发GPSS定位信息，显示坐标点，轨迹回放，GIS地图放大、缩小、选种等等操作。 -Visual C++ development of GIS and GPS to provide location information of the first online GPSS, display coordinates, track playback, GIS map to enlarge, shrink, selection, etc.