Understanding ZIP Code centroid matching - GeoTAX_Premium - 7 - 7.7

GeoTAX Premium for Windows, UNIX/Linux, and z/OS

Product type
Software
Portfolio
Verify
Product family
Geo Addressing
Product
GeoTAX Premium
Version
7.7
Language
English
Product name
GeoTAX Premium
Title
GeoTAX Premium for Windows, UNIX/Linux, and z/OS
Copyright
2023
First publish date
1998
ft:lastEdition
2023-10-19
ft:lastPublication
2023-10-19T16:49:54.924301

ZIP Code centroid matching is a center point of an area defined by either a ZIP Code or a ZIP+4, and is the least accurate type of geocode. A ZIP centroid is the center of a ZIP Code; a ZIP+4 centroid is the center of a ZIP+4. Since a ZIP+4 represents a smaller area than a ZIP Code, a ZIP+4 centroid is more accurate than a ZIP Code centroid.

The following diagram illustrates centroid matching. In the following example:

Only four of the six houses would have the same geocode in this example because only the four reside in the same ZIP+4 code.