空间信息查询与检索：包括属性查图、图查属性、统计分析、DEM查询等。
Spatial information inquiry and index: which contains inquire map information from attribute information, inquire attribute information from map information, statistical analysis, DEM inquiry, etc.
GIS技术与空间重心统计、空间自相关统计分析方法的结合，为粮食生产空间格局变化研究提供了可视化空间信息。
The combining of GIS, spatial mean center statistics and spatial autocorrelation statistics, has provided us with visualized spatial information of spatial pattern change of grain production.
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