Acquisition of spatial data with high speed is a key technology of digital city engineering.
空间数据快速采集是数字城市工程的关键技术。
After analysis, it is concluded that GIS spatial analysis, GIS model analysis and the acquisition technique for basic data is the researching direction.
经过分析论证得出的结论是：研究GIS空间分析、模型分析和基础数据的获取技术是今后努力的方向。
The low altitude data acquisition technology by unmanned aerial vehicle and aeroboat played important role in urban spatial information acquisition and updating.
无人机、飞艇等低空获取技术在城市空间信息的获取和更新方面发挥了积极的作用。
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