SSP U.S. Census STF3F Data, 1980, A special tabulation of 1980 U.S. Census data for school districts

This file contains summary level data for school districts. School districts were accumulated from the lowest geographic units available on the interbal summary tape file. On occasion, these units were apportioned to two or more school districts. Because of rounding and data truncation, it is possible that matrices with the same universe may not be equal.本文件收录学区的汇总层级数据。学区数据集源自内部汇总磁带文件中可获取的最低一级地理单元。部分场景下，此类地理单元会被分摊至两个及以上学区。由于四舍五入与数据截断操作，即便基于同一统计全域生成的数据矩阵也可能出现数值不一致的情况。