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).

人口普查相关产品档案库（Archive of Census Related Products, ACRP）中的1990年公共使用微数据样本区（Public Use Microdata Sample Areas, PUMA）边界文件子集，包含用于绘制覆盖美国本土、阿拉斯加州与夏威夷州的1990年PUMS数据的5%样本区域（apuma）与1%样本区域（bpuma）。此类边界文件基于地理匹配引擎（Geographic Correspondence Engine, GeoCorr）生成的对应文件创建。在合并这两类文件以生成PUMA地理区域时，需使用全国普查街区至PUMA地理对应文件。此外还可获取一份附加文件，其中包含由UIC（密苏里大学城市信息中心/计算办公室，Urban Information Center/Office of Computing, University of Missouri）计算得到的PUMA覆盖区域地理质心。该ACRP子集由国际地球科学信息网络中心（Center for International Earth Science Information Network, CIESIN）制作。