1990 Click here for access to the data through web-enabled Oracle Discoverer Geographic correspondence weights provide a basis for estimating 1980 census attributes using 1990 tract boundaries, or vice versa.
Weights are available based on the distributions of land area, population or housing units.
Weights PCT8090 allocate 1980 tract attributes to 1990 tract boundaries, while weights PCT9080 allocate 1990 tract attributes to 1980 tract boundaries. The weight estimates assume that land area, population, and housing units are distributed uniformly across the origin tract.