Geographic Information Systems;  MapX;  Electronic map

Electronic map is a vectorized and digitized map, which is a management system that processes information about geographical distribution data with the support of computer hardware and software. Analyze and study the methods and characteristics of GIS control to develop electronic maps, and give the method of MapX to develop electronic maps: first use Mapinfo to draw maps, divide the city electronic map to be made into different layers into VB, and develop Changsha electronic map in VB by introducing MapX control, which has functions such as query, zoom in, zoom out, roam, and ranging.