Address Location Codes

Location codes that begin with an "A" are address location codes. Address location codes indicate a geocode made directly to a street network segment (or two segments, in the case of an intersection).

An address location code has the following characters.

1st character Always an "A" indicating an address location.
2nd character May be one of the following
C Interpolated address point location
G Auxiliary file data location
I Application infers the correct segment from the candidate records
P Point-level data location
R Location represents a ranged address
S Location on a street range
X Location on an intersection of two streets
3rd and 4th character Digit indicating other qualities about the location.

Address Location Code Descriptions

Code Description
AGn Indicates an auxiliary file for a geocode match where "n" is one of the following values:
n = 0 The geocode represents the center of a parcel or building.
n = 1 The geocode is an interpolated address along a segment.
n = 2 The geocode is an interpolated address along a segment, and the side of the street cannot be determined from the data provided in the auxiliary file record.
n = 3 The geocode is the midpoint of the street segment.
APnn Indicates a point-level geocode match representing the center of a parcel or building, where "nn" is one of the following values:
nn = 00 User Dictionary centroid. Geocode returned by a User Dictionary.
nn = 02 Parcel centroid

Indicates the center of an accessor's parcel (tract or lot) polygon. When the center of an irregularly shaped parcel falls outside of its polygon, the centroid is manually repositioned to fall inside the polygon as closely as possible to the actual center.
nn = 04 Address points

Represents field-collected GPS points with field-collected address data.
nn = 05

Structure point

Indicates a location within a building footprint polygon that is associated with the matched address.

Usually, residential addresses consist of a single building. For houses with outbuildings (detached garages, sheds, barns, etc.), the structure point will typically fall on the primary structure.

Condominiums and duplexes have multiple, individual addresses and may have multiple structure points for each building. Multi-unit buildings are typically represented by a single structure point associated with the primary/base address, rather than discrete structure points for each unit.

Shopping malls, industrial complexes, and academic or medical center campuses are commonly represented by a single structure point associated with the primary/base address for the entire complex. When multiple addresses are assigned to multiple buildings within one complex, multiple structure points may be represented within the same complex.
nn = 07 Manually placed

Address points are manually placed to coincide with the midpoint of a parcel's street frontage at a distance from the center line.
nn = 08 Front door point

Represents the designated primary entrance to a building. If a building has multiple entrances and there is no designated primary entrance or the primary entrance cannot readily be determined, the primary entrance is chosen based on proximity to the main access street and availability of parking.
nn = 09 Driveway offset point

Represents a point located on the primary access road (most commonly a driveway) at a perpendicular distance of between 33-98 feet (10-30 meters) from the main roadway.
nn = 10 Street access point

Represents the primary point of access from the street network. This address point type is located where the driveway or other access road intersects the main roadway.
nn = 21 Base parcel point

When unable to match to an input unit number, or when the unit number is missing from an address location with multiple units, the "base" parcel information is returned, the address is not standardized to a unit number, and additional information, such as an Assessor's Parcel Number, is not returned.
nn = 22 Backfill address point

The precise parcel centroid is unknown. The address location assigned is based on two known parcel centroids.
nn = 23 Virtual address point

The precise parcel centroid is unknown. The address location assigned is relative to a known parcel centroid and a street segment end point.
nn = 24 Interpolated address point

The precise parcel centroid is unknown. The address location assigned is based on street segment end points.
AIn The correct segment is inferred from the candidate records at match time.
ASn

House range address geocode. This is the most accurate geocode available.
AIn and ASn, and ACnh share the same values for the 3rd character "n" as follows:
n = 0 Best location.
n = 1 Street side is unknown. The Census FIPS Block ID is assigned from the left side; however, there is no assigned offset and the point is placed directly on the street.
n = 2 Indicates one or both of the following:
  • The address is interpolated onto a TIGER segment that did not initially contain address ranges.
  • The original segment name changed to match the USPS spelling. This specifically refers to street type, predirectional, and postdirectional.
Note: Only the second case is valid for non-TIGER data because segment range interpolation is only completed for TIGER data.
n = 3 Both 1 and 2.
n = 7 Placeholder. Used when starting and ending points of segments contain the same value and shape data is not available.
ACnh Indicates a point-level geocode that is interpolated between 2 parcel centroids (points), a parcel centroid and a street segment endpoint, or 2 street segment endpoints.
The ACnh 4th character "h" values are as follows:
h = 0 Represents the interpolation between two points, both coming from User Dictionaries.
h = 1 Represents the interpolation between two points. The low boundary came from a User Dictionary and the high boundary, from a non-User Dictionary.
h = 2 Represents the interpolation between one point and one street segment end point, both coming from User Dictionaries.
h = 3 Represents the interpolation between one point (low boundary) and one street segment end point (high boundary). The low boundary came from a User Dictionary and the high boundary from a non-User Dictionary.
h = 4 Represents the interpolation between two points. The low boundary came from a non-User Dictionary and the high boundary from a User Dictionary.
h = 5 Represents the interpolation between two points, both coming from non-User Dictionaries.
h = 6 Represents the interpolation between one point (low boundary) and one street segment end point (high boundary). The low boundary came from a non-User Dictionary and the high boundary from a User Dictionary.
h = 7 Represents the interpolation between one point and one street segment end point and both came from non-User Dictionaries.
h = 8 Represents the interpolation between one street segment end point andone point, both coming from User Dictionaries.
h = 9 Represents the interpolation between one street segment end point (low boundary) andone point (high boundary). The low boundary came from a User Dictionary and the high boundary from a non-User Dictionary.
h = A Represents the interpolation between two street segment end points, both coming from User Dictionaries.
h = B Represents the interpolation between two street segment end points. The low boundary came from a User Dictionary and the high boundary from a non-User Dictionary.
h = C Represents the interpolation between one street segment end point (low boundary) and one point (high boundary). The low boundary came from a non-User Dictionary and the high boundary from a User Dictionary.
h = D Represents the interpolation between one street segment end point and one point, both coming from non-User Dictionary.
h = E Represents the interpolation between two street segment end points. The low boundary came from a non-User Dictionary and the high boundary from a User Dictionary.
h = F Represents the interpolation between two street segment end points, both coming from non-User Dictionaries.
ARn Ranged address geocode, where "n" is one of the following:
n = 1 The geocode is placed along a single street segment, midway between the interpolated location of the first and second input house numbers in the range.
n = 2 The geocode is placed along a single street segment, midway between the interpolated location of the first and second input house numbers in the range, and the side of the street is unknown. The Census FIPS Block ID is assigned from the left side; however, there is no assigned offset and the point is placed directly on the street.
n = 4 The input range spans multiple USPS segments. The geocode is placed on the endpoint of the segment which corresponds to the first input house number, closest to the end nearest the second input house number.
n = 7 Placeholder. Used when the starting and ending points of the matched segment contain the same value and shape data is not available.
AXn Intersection geocode, where "n" is one of the following:
n = 3 Standard single-point intersection computed from the center lines of street segments.
n = 8 Interpolated (divided-road) intersection geocode. Attempts to return a centroid for the intersection.