Not really.
It was a simplified statement of how the postal service looks at addresses
and where they are supposed to go.
The census bureau takes a somewhat more complex approach as it discusses the
permutations of addressing ad nauseum in chapter three of the TIGER
documentation. The "summation" is on page 3-23 where Address Range Record
Locations, Impute Flag Record Locations and ZIP Code Record Locations are
outlined for both record type 1's and record type 6's.
Complete chains have one end point labeled as the start node and the other
end point labeled as the end node. The start and end nodes are also
referred to as from and to. The start node always corresponds to the
beginning of the complete chain identified by the start node coordinates
FRLAT and FRLONG. The order of the addresses follows the sequence of the
nodes on the complete chain; the nodes may not be related to the low to high
orientation of the address range, The start address may be higher or lower
than the end address for a complete chain. Structure numbers usually, but
not always, systematically increase or decrease while moving along a street
in a set direction from one complete chain to the next.
Gaps may exist between multiple ranges for a single complete chain. A gap
may be significant, since any numbers missing from one complete chain may
actually appear on another complete chain in the case of address anomalies
such as out-of-parity or out-of-sequence addresses.
The simple rule I stated before seems to be fairly workable.
- Original Message -
From: Mats Elfström <[EMAIL PROTECTED]>
To: John Haynes <[EMAIL PROTECTED]>; MapInfo mailing list <[EMAIL PROTECTED]>
Sent: Saturday, July 15, 2000 9:41 AM
Subject: Re: MI Geocoding Streets
> Hmm...
> I cannot really figure out if you are being ironic here.
> For the case of geocoding addresses, left and right pertain strictly to
> the digitized direction of the line - no matter in what geographical
> direction it runs. And besides, streets may bend.
>
> So it is perfectly all right to have a definition
> FromLeft 56 ToLeft 2
> if that segment happens to be digitized in the opposite 'direction' of
> the numbering.
>
> While it of course would be recommendable to digitize in the same
> direction as the numbering, much available data may stem from the time
> when automated drawing was the ultimate goal for map digitizers, and no
> thought was given to GIS analysis, network creation or adress geocoding.
>
> Mats.E
> --
> :::
> :Email/ [EMAIL PROTECTED] ICQ#9517386 :
> :-:
> :Mail/ GISKRAFT, Mats Elfstroem, Vaepplingv 21, SE-227 38 LUND, SWEDEN:
> :Phones: +46 46 145959, +46 70 595 3935 :
> :::
>
--
To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put
"unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
