[Talk-us] Fwd: Postal Code Extract

Richard Welty rwelty at averillpark.net
Fri Aug 30 22:34:25 UTC 2013


On 8/30/13 6:12 PM, John F. Eldredge wrote:
> You may want to double-check with the Post Office, to find out whether 
> there is the possibility that there may legitimately be outliers in 
> some cases. I don't think the US Post Office guarantees that zip codes 
> will always define a single polygon with no outliers.
they absolutely do not guarantee anything of the sort. zip codes represent
delivery routes, not polygons. they can frequently be represented as 
polygons,
but there are definitely legitimate outliers.

richard

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