EASI Zip + 4 Centroid to Census Block Group Conversion File EASI Zip+4 Centroid to Census Block Group Conversion File The EASI Zip+4 Centroid to Census Block Group Conversion File maintains information that relates each residential ZIP+4 to its appropriate Block Group. EASI also identifies the longitude and latitude for the ZIP+4’s. This annual updates is a key component in the EASI update methodology.
This file can be used by direct mailers and others who need to summarize their ZIP+4 information into standard Census geography such as Block Groups or Census Tracts. It can also be used to display on a map of a ZIP+4 analysis.
The record layout is:
| 1-5 |
Zip Code |
6-9 |
Plus 4 |
| 10-13 |
Carrier Route |
14-15 |
State Alpha |
| 16-20 |
Country FIPS Code |
21-33 |
Block Group Code (XXXXXXXXXX.XXX) |
| 34-45 |
Census Tract Code (XXXXXXXXXX.XX) |
46-55 |
Latitude |
| 56-66 |
Longitute (First position is minus sign) |
67-69 |
Match COde (ID's ho good a match 100 is the best, to 4, etc) |
| 70-74 |
Average Mailable Households |
The above files are for residential ZIP+4s only; the business-to-business ZIP Codes without population (population is 0) are not included in this file (call for more information).
These database files are zipped into 1 file with all the ZIP +4’s. |
