[Talk-us] zip->city mappings

Paul Johnson baloo at ursamundi.org
Sun Nov 30 02:50:51 UTC 2014


Also note that Census ZIPs are somewhat fluid, as are postal ZIPs, and
postal ZIPs don't cover the entire country, and postal ZIPs are based on
carrier routes and not an area.

On Sun, Nov 9, 2014 at 6:05 PM, Richard Welty <rwelty at averillpark.net>
wrote:

> On 11/9/14 3:10 PM, Nathan Mills wrote:
>
>> Just keep in mind that some ZIPs cover multiple cities. The one I'm
>> standing in now is found in parts of at least 3 different cities that I
>> know of. Others cover both (parts of) cities and unincorporated areas
>> outside of the city whose name they are associated with.
>>
> this snippet, from my longer reply over in the new I.D. Feature thread,
> discusses this:
>
> as for that many to one mapping that isn't, basically,
> for each zip code there is a primary city and potentially
> a number of secondary cities. the primary city is the
> city name of the post office that serves the routes; the
> secondary cities are generally traditional place names
> within the delivery area; for example, for years i lived
> in the Lansingburgh neighborhood of Troy NY, and
> the post office would deliver mail for either city name.
> any effort to crowd source this data would need to take
> care of that detail.
>
>
> richard
>
> --
> rwelty at averillpark.net
>  Averill Park Networking - GIS & IT Consulting
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>
>
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