XX市基础地理信息系统”VB+AO源代码,道路限速,加油站设置，测距-XX city geographic information system based on VB+ AO source code, road speed limits, gas stations settings, ranging

以前用pb7.0写的地图，这个网上一般就到大城市，后来修改成能分清“XX市XX区”。-Map with pb7.0 written before, the Internet is generally went to the big city, and later modified to distinguish between " XX City, XX Zone."