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1. Portland Census Tracts 1970

This shapefile contains the 1970 Portland geometric census tracts. Using CRS: NAD83 Oregon North .

2. Portland Census Tracts 1980

geometry of 1980 Portland Census tracts.

3. Portland Census Tracts 1990

geometric 1990 Portland Census tracts.

4. Portland Census Tracts 2000

geometric 2000 Portland Census tracts.

5. Population Density in Watersheds: San Francisco Bay Area, California, 2009

2009. Bay Area Open Space Council, Conservation Lands Network, San Francisco Bay Area Upland Habitat Goals Project, and GreenInfo Network (Firm). This polygon shapefile depicts a watershed integrity cluster analysis at the CalWater 2.2.1 Planning Watershed (PWS) level performed by mapping fac... Bay Area Open Space Council.

6. Provincial Boundaries: China, 2000

2000. University of Michigan. China Data Center and Beijing Hua tong ren shi chang xin xi you xian ze ren gong si. This polygon shapefile represents provincial boundaries of China for 2010. This layer is part of the 2010 China Province Population Census Dataset.... Beijing Hua tong ren shi chang xin xi you xian ze ren gong si.

7. Census Block Groups, 2000 - San Francisco Bay Area, California

2000. California. Metropolitan Transportation Commission and U.S. Department of Commerce, Bureau of the Census, Geography Division. This polygon shapefile displays U.S. Census Block Groups for the San Francisco Bay Area in California as of January 1, 2000. Block Groups (BGs) are... California. Metropolitan Transportation Commission.

8. Census Blocks, 2000 - San Francisco Bay Area, California

2000. California. Metropolitan Transportation Commission and U.S. Department of Commerce, Bureau of the Census, Geography Division. This polygon shapefile represents U.S. Census Blocks for the San Francisco Bay Area of California as of the year 2000. Census blocks are statistica... California. Metropolitan Transportation Commission.

9. Census Blocks, 2000 - San Francisco Bay Area, California

2000. California. Metropolitan Transportation Commission and U.S. Department of Commerce, Bureau of the Census, Geography Division. The polygons in this data layer represent U.S. Census Blocks for the San Francisco Bay Area in California. These data have been clipped to the shor... California. Metropolitan Transportation Commission.

10. Census Counties, 2000 - San Francisco Bay Area, California (Clipped)

2000. California. Metropolitan Transportation Commission and U.S. Department of Commerce, Bureau of the Census, Geography Division. This polygon shapefile displays the boundaries for the 9 counties of the San Francisco Bay Area in California as of January 1, 2000. These data hav... California. Metropolitan Transportation Commission.