Table 4.

Percentages of addresses geocoded to 1990 census and then assigned to a 1960, 1970, and 1980 census tract, the LC-SES study, 2001–2002. ¹Jackson, MS & Washington Co., MD print files of U.S. Bureau of the Census housing data for 1960 [34]. ²Includes some addresses sent to vendor but not assigned a latitude and longitude.

	% of All Addresses
Street addresses for 1960 (N = 8200)
Sent to geocoding vendor	89
Vendor assigned latitude and longitude	61
1960 tract assigned using overlay/comparability file	26
1960 Assigned area by overlay (non tract area)1	16
1970 tract Assigned (non tract area-1960)	16
1960 tract Assigned manually2	8
Total addresses assigned tract	66
Street addresses for 1970 (N = 12671)
Sent to geocoding vendor	93
Vendor assigned latitude and longitude	71
1970 tract assigned using overlay	69
1970 tract assigned manually2	7
Total addresses assigned tract	76
Street addresses for 1980 (N = 3277)
Sent to geocoding vendor	94
Vendor assigned latitude and longitude	81
1970 tract assigned using overlay	80
1970 tract assigned manually2	5
Total addresses assigned tract	85