Expanded Centroids

In some cases, more than one point-level geocode is available for an address matched in Master Location Data (MLD). For more information about the different types of point-level geocodes, see the "APnn" definitions in Address Location Codes. When more than one point-level geocode is available from MLD data, only the highest quality geocode is returned with the matched address data.

The Expanded Centroids feature is available with MLD and the optional Master Location Structure Centroid Data Set (MLDB). If an address match is found in MLD, and the MLDB data set is added as a database resource, the MLDB data set is searched for additional geocodes for the matched address. If additional geocodes are found for the matched address, these are returned.

An Expanded Centroids match is indicated by an "A14" value for the IsAlias return field. The returned location code for an Expanded Centroids match will have an "APnn" value with a data type of "MASTER LOCATION".