Domestic well locations and populations served in the contiguous U.S.: 1990, Block-group method (BGM) map.
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In this dataset we present two maps that estimate the location and population served by domestic wells in the contiguous United States. The first methodology, called...
本数据集呈现两份地图，用于估算美国本土（contiguous United States）境内民用水井的分布位置及其服务的人口规模。第一种研究方法被称为……
