The Time Dimension: presented versus 1991 ZIP Codes

Time Dimension: presented versus 1991 ZIP Codes inkeeping track of all the changes over time. Otherwise,
one ZIP and the other side in a United States Americayou may wind up concluding that there has been a
ZIP Code. The block to ZIP equivalency file organizeddramatic downward trend in the population of 63301
by the vendors each chunk was assign to one andsince 1980, when in fact just the opposite is true.
only one survey building block.What the world really needs to deal with ZIP code
An important object to keep in mind about ZIP codenatural features properly is a large geographic
finder is that they change over time. In some casesequivalency organizer linking ZIP code finder to other
these change can be quite amazing, but morerelevant geographies with a time aspect. Instead, what
frequently they are small and subtle. When a ZIP codewe have is such an equivalency file that relates ZIP
changes its definition it does not change its name like acodes to geographic entities primarily used for taking
census zone. The ZIP code that was called '63301' inthe 1990 census. This file uses ZIP codes as they
St. Charles County, Mo in 1985 has since been brokenwere defined around July of 1991. What we are
into first two and now three ZIP codes. These newreferring to here is the ZIP CODE FINDER
codes were not called 63301.01, 63301.02 and 63301.03;DATABASE and the corresponding Braintech web
they were called 63301, 63303 and 63304. So what isapplication for programming script which we'll be
referred to as 63301 today represent about a third ofdiscussion about in more detail is visit you site. For now,
the area that it referred to in 1985. The new codewhat we want to emphasize is that when we talk
63303 did not exist 12 years ago and it has alreadyabout ZIP codes we really need to keep a time
changed its definition so that it now represents aboutreference in mind. Just as when you work with census
partially of the area it included when it was to begintracts you need to know whether you mean 1980 or
with created. What this means, of course, is that ZIP1990 tracts, or when you are talking about the
codes are really terrible units for doing any kind ofcountries of Europe -- time is an important dimension.
time-series analysis unless you have some way of