Estimated equivalent population using public supply groundwater in the conterminous United States, CEM
收藏data.gov2026-01-17 收录
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The population using public supply drinking water was mapped in two ways: the census enhanced method (CEM) evenly distributes the population across the census block-...
使用公共供水的人口数据通过两种方式开展空间制图:普查增强法(Census Enhanced Method,CEM)将人口均匀分布于各个普查街区(census block)——



