Through the processing of the aerophotography and the satellitic picture, the Helawa system can output the electronic map.
海拉瓦系统可以对最新的航空摄影、卫星图片进行全数字化信息处理,形成完整的电子地图沙盘。
The development using the language of AUTOLISP (VLISP) can make lots of multifarious and fallible work simplified and programmed in the Aerophotography and mapping of railway.