Table 3 Historical addresses queried, geocoding success rates and characteristics of addresses not successfully geocoded, the LC-SES study, 2001–2002. 1The address information was assigned to the centroid of a zip code area in which all addresses fell within a single block group or census tract or more than 80% of addresses fell within the same census tract.
N | %age | |
|---|---|---|
Addresses for ages 30, 40, and 50 queried | 24,148 | 100 |
Partial or complete street address provided | 22,140 | 92 |
No address, P.O box, or no street name | 2,008 | 8 |
Commercial Geocoding Results | 22,140 | 100 |
Address match (geocoded to 1990 census tract) | 16,445 | 74 |
Usable centroid match1 | 145 | <1 |
Not matched or geocoded to census tract | 5,550 | 25 |
Characteristics of addresses not matched or geocoded to census tract | 5,550 | 100 |
Street with number | 1,690 | 30 |
Cross-street | 923 | 17 |
Street name without number | 2,937 | 53 |