By local government (typically county government) law or administrative procedure, as governed by state law.
Example
Chester County (PA) Tax Assessment Department Bureau of Land Records
Wake County (NC) Revenue Department
Delaware County (OH) Auditor's Office
Notes/Comments
1. The Address Parcel Identifier Source designates the agency, organization, or jurisdiction that assigns and maintains the Address Parcel Identifier.
2. If known, give the full name of the agency (department, office, etc.) rather than just the jurisdiction name.
3. In giving a jurisdiction name, if possible follow known naming standards, such as the ANSI (formerly FIPS) names or codes for states and counties, or GNIS names or codes for minor civil divisions, populated places, and other features.
The primary permanent identifier, as defined by the Address Parcel Identifier Source, for a parcel that includes the land or feature identified by an address. A parcel is "a single cadastral unit, which is the spatial extent of the past, present, and future rights and interests in real property."
Definition source
For "parcel identifier": Adapted from FGDC, May 2008. "Geographic Information Framework Data Content Standard Part 1: Cadastral." Section 4.2.
For "parcel": FGDC, May 2008. "Cadastral Data Content Standard for the National Spatial Data Infrastructure." Vesion 1.4 – Fourth Revision. p. 45. (Part 3.2 "Parcel)
Data Type
characterString
Existing Standards for this Element
Determined by local ordinance or procedure, or in some cases by state law.
Domain of Values for this Element
Determined by local procedure.
Source of Values
Address Parcel Identifier Source
How Defined (eg, locally, from standard, other)
By local procedure, as it may be governed by local ordinance or state law.
Example
5142301020000 (= the address identifies the land or a feature within parcel 5142301020000)
07660254993-000 (= the address identifies the land or a feature within parcel 07660254993-000)
176-N-075 (= the address identifies the land or a feature within parcel 176-N-075)
Notes/Comments
1. Parcels and addresses are created independently of each other. Some addresses locate features on one parcel only, and some addresses locate features that encompass multiple parcels. There are addresses that locate features that are not on tax parcels, but that are on ownership parcels such as federally-managed lands or public rights of way. Conversely there are parcels that have no address at all, parcels that have one address, and parcels that have many addresses (e.g. large parcels that front on or encompass more than one thoroughfare).
2. Thus no specific address-parcel relationship can be assumed. Addresses and parcels should be treated as independent of each other, and the relationship between should be treated, in relational database terms, as a many-to-many relationship. By providing an Address Parcel Identifier and an Address Parcel Identifier Source, the address standard provides a means to link an address with any number of parcels, and to link a parcel with any number of addresses.
3. The Address Parcel Identifier corresponds to the Parcel ID element in the Cadastral Standard. The Parcel ID is the primary key that identifies each record or occurrence in the Parcel entity. That, plus the Address Parcel Identifier Source, are the only parcel elements included or needed within the address standard. All other parcel elements are defined within the Cadastral Standard and need not be repeated here.
