Domestic well locations and populations served in the contiguous U.S.: 1990, Block-group method (BGM) map.

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...本数据集提供两幅地图，用以估算美国本土（contiguous United States）境内家用机井的分布位置及其服务覆盖的人口总量。第一种研究方法被命名为……