Key:ref:linz:address_id
 ref:linz:address_id
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| Description |
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Unique identifier for a street address in the Land Information New Zealand's Addressing Information Management System 
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| Group: references |
| Used on these elements |
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Status: imported
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The ref:linz:address_id=* tag is added to street addresses in New Zealand when they are imported. The tag was first introduced during the 2017 import, and is being used for ongoing maintenance, and for the 2021 import.
As a mapper, you don't need to worry about this tag, or its value. If it accidently deleted, moved, edited, or duplicated, the LINZ Address Import project will detect it and suggest fixing it.
Standard Case
For a normal address, an example of the tag is ref:linz:address_id=123456. 123456 is the address_id of the address in LINZ's Addressing Information Management System (AIMS).
Example: 5504304112
5504304112
Complex Cases (stacks)
In some situations, such as tall apartment buildings or hotels, there may be hundreds of addresses in a single location. In this case, the value of ref:linz:address_id=* may be a stack, such as ref:linz:address_id=stack(120-190), which means there are 70 units/flats at that location, which all have the same house number. In that example, 120 is the first ID, and the 190 is the last ID.
2100738956 2100738956 is an example of a stacked address for a hotel with 21 rooms.
292667892
292667892 is an example where the range of address_ids is complicated due to repeated subdividing.
OSM Character limit
The maximum number of characters allowed in an OpenStreetMap tag value is 255. If a stack contains many address IDs, such as stack(100-105,107,203-209,...) and this value is too long, then it will be 
hashed to reduce it's length but remain a unique ID.
8909376872 8909376872 is an example where the value of this tag had to be hashed to reduce it's length.