Archive of Census Related Products (ACRP): 1990 Enhanced Migration Files
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下载链接：
https://earthdata.nasa.gov/data/catalog/sedac-ciesin-sedac-acrp-1990-emf-1.00
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资源简介：
The 1990 Enhanced Migration Files portion of the Archive of Census Related Products (ACRP) contains migration data derived from the U.S. Census Bureau's Summary Tape File (STP-28). The data includes counts by race and hispanic origin within each county, county to county, and state to state. This portion of the ACRP is produced by the Columbia University Center for International Earth Science Information Network (CIESIN).
提供机构：
Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC)
创建时间：
2014-04-01
