The GIS space data accuracy and quality can directly affect a national GIS application more intensively and extensively.
GIS空间数据精度与质量直接影响一个国家GIS应用的广度与深度。
These three questions are: the technology of developing a special Urban GIS analysis and query of GIS space data browse and output of GIS space data.
这三个问题包括：专用城市地理信息系统的开发技术、GIS空间数据的查询与分析、GIS空间数据的浏览与输出。
GIS supports the collection, storage and display of geographic space data, and provides information inquiry and analysis by relating the geographic space data with reference data.
GIS支持地理空间数据的采集、存储和显示，并能将地理空间数据与相关参考数据关联以提供信息查询与分析。
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