Because of large amount of spatial data in this operation, it is a critical technique in GIS about how to realize spatial overlap analysis very quickly with higher accuracy.
由于空间数据量较大，如何快速准确地完成空间叠值分析运算是GIS系统中比较关键的技术。
Due to its large amount of spatial data and highly complex spatial objects and spatial queries, the study of spatial queries become focus of spatial database research.
由于其庞大的空间数据量以及空间物标、空间查询的高度复杂性，空间查询成为空间数据库应用的难点和研究热点。
By using GIS method, a wetlands GIS spatial database of Heilongjiang province was built based on collecting a vast amount of wetlands data.
以GIS技术为手段，在收集大量有关湿地材料的基础上，完成了黑龙江省湿地GIS空间数据库的建立。
TIN composing discrete terrain points almost has the same amount of spatial data as it is and the response time of analysis and 3d visualization becomes too long to wait for.
由离散高程点生成的TIN同样也具有相当大的数据量，这严重制约了TIN的分析、三维可视化等处理速度。
TIN composing discrete terrain points almost has the same amount of spatial data as it is and the response time of analysis and 3d visualization becomes too long to wait for.
由离散高程点生成的TIN同样也具有相当大的数据量，这严重制约了TIN的分析、三维可视化等处理速度。
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