The GeoTAX Service will return one of the following location code for an address match.
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.
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1st character |
Always an " |
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2nd character |
May be one of the following: |
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Interpolated address point location |
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Auxiliary file data location |
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Application infers the correct segment from the candidate records |
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Point-level data location |
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Location represents a ranged address |
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Location on a street range |
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Location on an intersection of two streets |
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3rd and 4th character |
Digit indicating other qualities about the location. |
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Location Codes
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Indicates a geocode match to a GeoTAX Auxiliary or Landmark Auxiliary file where n is one of the following values: |
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The geocode represents the center of a parcel, building or landmark. |
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The geocode is an interpolated address along a segment. |
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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. |
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The geocode is the midpoint of the street segment. |
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Indicates a point-level geocode match representing the center of a parcel or building, where nn is one of the following values: |
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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. |
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Address points Represents field-collected GPS points with field-collected address data. |
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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. |
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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. |
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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. |
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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. |
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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. |
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Base parcel point The point data includes individual parcels that may be "stacked". These stacked parcels are individually identified by their unit or suite number, and Spectrum Enterprise Tax is able to match to this unit number and return the correct tax jurisdictions. If an input address is for a building or complex without a unit number, the "base" parcel information returns and will not standardize to a unit number or return additional information such as tax jurisdictions. |
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Backfill address point The precise parcel centroid is unknown. The address location assigned is based on two known parcel centroids. |
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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. |
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Interpolated address point The precise parcel centroid is unknown. The address location assigned is based on street segment end points. |
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The correct segment is inferred from the candidate records at match time. |
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House range address geocode. This is the most accurate street interpolated geocode available. |
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Best location. |
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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. |
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Indicates one or both of the following:
Note: Only the second case is valid for non-TIGER data because
segment range interpolation is only completed for TIGER
data.
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Both 1 and 2. |
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Placeholder. Used when starting and ending points of segments contain the same value and shape data is not available. |
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Ranged address geocode, where "n" is one of the following: |
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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. |
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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. |
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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. |
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Placeholder. Used when the starting and ending points of the matched segment contain the same value and shape data is not available. |
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Intersection geocode, where n is one of the following: |
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Standard single-point intersection computed from the center lines of street segments. |
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Interpolated (divided-road) intersection geocode. Attempts to return a centroid for the intersection. |
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Street Centroid Location Codes
Street centroid location codes indicate the Census ID accuracy and the position of the geocode on the returned street segment. A street centroid location code has the following characters.
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1st character |
Always " |
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2nd character |
Census ID accuracy based on the search area used to obtain matching Street Segment. |
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3rd character |
Location of geocode on the returned street segment. |
The table below contains the values and descriptions for the 2nd - 3rd characters in the street centroid location codes.
| Character position | Code | Description |
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2nd Character |
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Block Group accuracy (most accurate). Based on input ZIP Code. |
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Census Tract accuracy. Based on input ZIP Code. |
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Unclassified Census accuracy. Normally accurate to at least the County level. Based on input ZIP Code. |
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Unknown Census accuracy. Based on Finance area. |
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Unknown Census accuracy. Based on input City. |
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3rd Character |
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Segment Centroid. |
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Segment low-range end point. |
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Segment high-range end point. |
ZIP + 4 Location Codes
Location codes that begin with a "Z" are ZIP + 4 centroid location codes. ZIP + 4 centroid location codes indicate the quality of two location attributes: Census ID accuracy and positional accuracy. A ZIP + 4 centroid location code has the following characters.
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1st character |
Always " |
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2nd character |
Census ID accuracy. |
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3rd character |
Location type. |
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4th character |
How the location and Census ID was defined. Provided for completeness, but may not be useful for most applications. |
The table below contains the values and descriptions for the 2nd- 4th characters in the ZIP + 4 location codes.
| Character Position | Code | Description |
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2nd Character |
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Block Group accuracy (most accurate). |
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Census Tract accuracy. |
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Unclassified Census accuracy. Normally accurate to at least the County level. |
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3rd Character |
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Location of the Post Office that delivers mail to the address, a 5-digit ZIP Code centroid, or a location based upon locale (city). See the 4th character for a precise indication of locational accuracy. |
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Location based upon a ZIP + 2 centroid. These locations can represent a multiple block area in urban locations, or a slightly larger area in rural settings. |
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Location based upon a ZIP + 4 centroid. These are the most accurate centroids and normally place the location on the correct block face. For a small number of records, the location may be the middle of the entire street on which the ZIP + 4 falls. See the 4th character for a precise indication of locational accuracy. |
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4th Character |
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Address matched to a single segment. Location assigned in the middle of the matched street segment, offset to the proper side of the street. |
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Address matched to a single segment, but the correct side of the street is unknown. Location assigned in the middle of the matched street segment, offset to the left side of the street, as address ranges increase. |
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Address matched to multiple segments, all segments have the same Block Group. Location assigned to the middle of the matched street segment with the most house number ranges within this ZIP + 4. Location offset to the proper side of the street. |
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Same as methodology |
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Address matched to multiple segments, with all segments having the same Census Tract. Returns the Block Group representing the most households in this ZIP + 4. Location assigned to t he middle of the matched street segment with the most house number ranges within this ZIP + 4. Location offset to the proper side of the street. |
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Same as methodology |
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Address matched to multiple segments, with all segments having the same County. Returns the Block Group representing the most households in this ZIP + 4. Location assigned to the middle of the matched street segment with the most house number ranges within this ZIP + 4. Location offset to the proper side of the street. |
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Same as methodology |
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Street name matched; no house ranges available. All matched segments have the same Block Group. Location placed on the segment closest to the center of the matched segments. In most cases, this is on the mid-point of the entire street. |
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Street name matched; no house ranges available. All matched segments have the same Census Tract. Location placed on the segment closest to the center of the matched segments. In most cases, this is on the mid-point of the entire street. |
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Street name matched (no house ranges available). All matched segments have the same County. Location placed on the segment closest to the center of the matched segments. In most cases, this is on the mid-point of the entire street. |
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Same as methodology |
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Created ZIP + 2 cluster centroid as defined by methodologies
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Created ZIP + 2 cluster centroid as defined by methodologies
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Created ZIP + 2 cluster centroid as defined by methodologies
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Created ZIP + 2 cluster centroid as defined by methodology
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Created ZIP+2 cluster centroid as defined by methodology
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Created ZIP + 2 cluster centroid as defined by methodology
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ZIP Code is obsolete and not currently used by the USPS. Historic location assigned. |
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Over 95% of addresses in this ZIP Code are in a single Census Tract. Location assigned to the ZIP Code centroid. |
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Over 80% of addresses in this ZIP Code are in a single Census Tract. Reasonable Census Tract accuracy. Location assigned to the ZIP Code centroid. |
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Less than 80% of addresses in this ZIP Code are in a single Census Tract. Census ID is uncertain. Location assigned to the ZIP Code centroid. |
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Rural or sparsely populated area. Census code is uncertain. Location based upon the USGS places file. |
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P.O. Box or General Delivery addresses. Census code is uncertain. Location based upon the Post Office location that delivers the mail to that address. |
Geographic Centroid Location Codes
Location codes that begin with "G" are geographic centroid location
codes. Geographic centroids may be returned if the geographic centroid fallback
option is enabled and an address-level geocode could not be determined. Geographic
centroid location codes indicate the quality of a city, county, or state
centroid.
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1st character |
Always " |
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2nd character |
Geographic area type. One of the following:
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