Pitney Bowes MapXtreme - Manual (Page 341)

Chapter 18: Geocoding
Understanding Accuracy for Close Matches
MapXtreme v7.1 348 Developer Guide
• SX – point located at street intersection
• SO – no coordinates available (very rare occurrence)
Best Match from Multiple Candidates (M Category)
Matches in the M category indicate that there is more than one close match candidate for the record
and the server or service has chosen the best one of those candidates. As in the S category, the
second position in the code of M category matches the positional accuracy of the resulting point
object.
• M1 – multiple close matches, point located at postal code centroid
• M2 – multiple close matches, point located at ZIP+2 centroid (US centric)
• M3 – multiple close matches, point located at ZIP+4 centroid (US centric)
• M4 – multiple close matches, point located at the center of a shape point path (shape points
define the shape of the street polyline)
• M5 – multiple close matches, point located at a street address position (highest accuracy
available)
• M6 – multiple close matches, point located at point postal code location
• MX – multiple close matches, point located at street intersection
• M0 – multiple close matches, no coordinates available
Postal Code Centroid Matches (Z Category)
Matches in the Z category indicate that no street match was made, either: 1) because there is no
close match and you allowed the server or service to fall back to postal code centroid; 2) the address
is a P.O. Box or rural address; or 3) you set the server or service to match to postal code centroids.
The resulting point is located at the postal code centroid with four possible accuracy levels.
• Z1 – Postal code centroid match
• Z2 – ZIP+2 centroid match (US centric)
• Z3 – ZIP+4 centroid match (highest accuracy available, US centric)
• Z6 – Postal code centroid match for point ZIP
• Z0 – Postal code match, no coordinates available (very rare)
L
Point ZIPs are ZIP Codes without an area. These include P.O. Box ZIPs and Unique ZIPs
(single site, building, or organization). When using a non US address dictionary, the results in
this category will still be a Z.
Geographic Centroid Matches (G category)
Matches in the G category indicate that no street match was made. This takes place when no close
match is found, and the server or service is configured to fall back to the geographic centroid. The
resulting point is located at the geographic centroid with the following possible accuracy levels.
• G0 – areaName0 centroid (country)
• G1 – areaName1 centroid (country subdivision)