Overlay is used in data integration and is a technical process, the results of which can be used in realistic forms of spatial analysis.
叠盖被使用在资料综合化和是一个技术过程，结果能被使用在现实形式的空间分析。
Overlay is used in data integration and is a technical process, the results of which can be used in realistic forms of spatial analysis.
叠盖被使用在资料综合化和是一个技术过程，结果能被使用在现实形式的空间分析。
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