1990 point population coverage for the Conterminous United States
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This is a point coverage of the 1990 Census of Population and Housing for the conterminous United States. (Alaska and Hawaii are available separately). The coverage...
本数据集为美国本土（conterminous United States）1990年人口与住房普查（1990 Census of Population and Housing）的点位覆盖数据。（阿拉斯加州与夏威夷州的数据可单独获取。）该覆盖范围……
