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House Numbering Systems in Los Angeles

I was looking for geocoding in LA County, and came across a paper by Peter Fonda-Bonardi (the County’s acknowledged expert in Addressing).  Click here to see the paper

The first paragraph (written in 1994):

The County of Los Angeles (LAC) and its adjacent public agencies use at least sixty (60) different house numbering systems (HNSs) to assign addresses to streets and buildings. An unknown number of private house numbering systems assign addresses to commercial complexes, mobile home parks, and gated tracts. Other addressing systems locate callboxes along freeways, mileposts along highways and railways, stations along rivers and flood channels, aqueducts, pipelines, or power lines. The use of so many HNSs leads to many duplicate street names and address ranges, which complicate the construction of address reference file and automated geocoding. This document is an initial inventory and technical description of the County’s publicly-maintained HNSs, including an HNS attribute table useful for the automated editing of topological address reference files such as TIGER.

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