Archive of Census Related Products (ACRP): 1990 Public Use Microdata Sample Areas (PUMA) Boundary Files

The 1990 Public Use Microdata Sample Areas (PUMA) Boundary Files portion of the Archive of Census Related Products (ACRP) consists of 5% sample (apuma) and 1% sample (bpuma) areas for the mapping of 1990 PUMS data covering the continental United States, Alaska, and Hawaii. These boundary files are created based on equivalency files generated by the Geographic Correspondence Engine (GeoCorr). A national census tract to PUMA geography correspondence file is used in merging the two files resulting in the PUMA geographies. An additional file is also available consisting of geographic centroids for the PUMA coverages calculated by UIC (Urban Information Center/Office of Computing, University of Missouri). This portion of the ACRP is produced by the Center for International Earth Science Information Network (CIESIN).

《1990年公共使用微观数据样本区域（PUMA）边界文件》是《人口普查相关产品档案（ACRP）》的一部分，该部分包含了覆盖美国大陆、阿拉斯加和夏威夷的1990年PUMS数据的5%样本（apuma）和1%样本（bpuma）区域。这些边界文件是基于地理对应引擎（GeoCorr）生成的等值文件创建的。通过使用国家人口普查区与PUMA地理对应文件，将两个文件合并，从而形成PUMA地理区域。此外，还提供了一份包含由密苏里大学城市信息中心/计算办公室（UIC）计算出的PUMA覆盖范围的地理质心文件。ACRP的这一部分由国际地球科学信息网络中心（CIESIN）制作。