China County-Level Data on Population (Census) and Agriculture, Keyed To 1:1M GIS Map consists of census, agricultural economic, and boundary data for
the administrative regions of China for 1990. The census data includes urban and rural residency, age and sex distribution, educational attainment, illiteracy, marital status, childbirth,
mortality, immigration (since 1985), industrial/economic ... activity, occupation, and ethnicity. The agricultural economic data encompasses rural population, labor force, forestry, livestock
and fishery, commodities, equipment, utilities, irrigation, and output value. The boundary data are at a scale of one to one million (1:1M) at the county level. This dataset is produced
in collaboration with the University of Washington as part of the China in Time and Space (CITAS) project, University of California-Davis China in Time and Space (CITAS) project, and the
Columbia University Center for International Earth Science Information Network (CIESIN).