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21. China historical 1982 county population census data

Polygon Harvard University Restricted content
1982. Beijing Hua tong ren shi chang xin xi you xian ze ren gong si and University of Michigan. China Data Center. This polygon datalayer includes China county boundaries with 1982 population census data. The 1982 administrative maps (county and province) was pr... All China Marketing Research Co. ; distributed by University of Michigan China Data Center, Ann Arbor, Mich.

22. China historical 1982 province boundaries

Polygon Harvard University Restricted content
1982. Beijing Hua tong ren shi chang xin xi you xian ze ren gong si and University of Michigan. China Data Center. This polygon datalayer shows China province boundaries for 1982. The 1982 administrative maps (county and province) was primarily based on 'China M... All China Marketing Research Co. ; distributed by University of Michigan China Data Center, Ann Arbor, Mich.

23. China historical 1990 county population census data - Part A

Polygon Harvard University Restricted content
1990. Beijing Hua tong ren shi chang xin xi you xian ze ren gong si and University of Michigan. China Data Center. This polygon datalayer includes China county boundaries with 1990 population census data. It is one (Part A) of two layers containing the entire 19... All China Marketing Research Co. ; distributed by University of Michigan China Data Center, Ann Arbor, Mich.

24. China historical 1990 county population census data - Part B

Polygon Harvard University Restricted content
1990. Beijing Hua tong ren shi chang xin xi you xian ze ren gong si and University of Michigan. China Data Center. This polygon datalayer includes China county boundaries with 1990 population census data. It is one (Part B) of two layers containing the entire 19... All China Marketing Research Co. ; distributed by University of Michigan China Data Center, Ann Arbor, Mich.

25. China historical 1990 province boundaries

Polygon Harvard University Restricted content
1990. Beijing Hua tong ren shi chang xin xi you xian ze ren gong si and University of Michigan. China Data Center. This polygon datalayer shows China province boundaries for 1990. The 1990 administrative maps were primarily based on the 'The Administrative Maps ... All China Marketing Research Co. ; distributed by University of Michigan China Data Center, Ann Arbor, Mich.

27. Global GIS : Airfields

Point Harvard University Restricted content
1997. United States. National Imagery and Mapping Agency. This datalayer is a point coverage representing airports and airfields worldwide and was published as part of the USGS Global GIS : global coverage... American Geological Institute.

28. Global GIS : Alaska Faults

Line Harvard University Public content
1980. Geological Survey (U.S.), American Geological Institute, and Alaska. Division of Geological and Geophysical Surveys. This datalayer is a polyline coverage with associated attributes representing geologic faults of Alaska. It is a digital version of the fault featu... American Geological Institute.

29. Global GIS : Alaska Geology

Polygon Harvard University Public content
1980. Geological Survey (U.S.), American Geological Institute, and Alaska. Division of Geological and Geophysical Surveys. This datalayer is a polygon coverage with associated attributes representing geologic regions of Alaska. It is a digital version of the geology fea... American Geological Institute.

30. Global GIS : Aqueducts, canals, flumes, penstocks

Line Harvard University Public content
1997. United States. National Imagery and Mapping Agency. This datalayer is a polyline coverage representing major roads worldwide and was published as part of the USGS Global GIS : global coverage databas... American Geological Institute.