Re: Parsing postal addresses

Alex Colvin wrote:
>
> typically you parse a US street address into
> house number, pre-directional, street name, street type, post directional city, state, zip zip4
> with optional apartment numbers and a wide set of abbrevioations.
> The classic example is 123 E E E St. = 123E East E Street.


Even this isn't enough to deal with Washington DC, where all
directions are relative to the capital, and any given street
address can be present in up to 4 quadrants:


123E E St, NW
123E E St, NE
123E E St, SE
123E E St, SW


Of course the avenues are spokes and are typically present
in only 1 or 2 quadrants:


1600 Pennsylvania Ave, NW
1600 Pennsylvania Ave, NE


To make matters worse, typically the first three digits of a
Zip code are common to a single state, but DC shares 201xx
with several towns in Virginia which used to be in 220xx;
lots of software packages used to partition addresses based
upon the first 3 digits of the zip code (and UPS used to
bill based upon them) which generally results in misdirected
mail, etc. Enjoy...


--
W. Craig Trader, Senior Internet Engineer <ct7@mitre.org>
--

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