1990 Census Block Groups

This dataset includes census block groups for all 16 counties in the NCTCOG region. These delineations were prepared for tabulation of the 1990 decennial census data.本数据集涵盖北德克萨斯中部政府理事会（NCTCOG）辖区内全部16个县的人口普查街区组（census block groups）。此类区划边界专为1990年十年一次人口普查数据的统计制表工作而编制。