This is very important for the GIS data updating, particularly for those urban areas where ground features change rapidly.
这对于GIS数据更新尤其是对于特征变化很快的城市地区的数据更新十分重要。
One of the major functions of GIS is data management and data updating is one of the most fundamental requirements of the data management.
GIS的主要功能之一是数据管理，而数据更新是其最基本的要求之一。
The study shows that the mobile GIS has obvious advantage compared with traditional method in data collecting on field and data updating for land use; so, it can be used widely in land investigation.
研究结果表明，移动GIS较之于传统方法在信息收集与更新数据方面有很大的优势，在以后国家的土地详查中值得研究与推广。
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