After googling around and playing w/ the files, here's what I found:
There are 4809 characters per row, and 2 rows make up a record for
a total of ~9618 characters (columns) total.
is the file you need.
In this file, the rows starting with "G1", "T1", "F1" start a new
field. All rows until the next "G1", "T1", or "F1" are about the
An "F1" row just indicates a filler of blank spaces. These only
occur at the end of each line (2 lines = 1 record) to keep the row
An example of set of "G" rows in STF1CRDD.ASC and what they mean:
G1 AREAWAT 10 A/N 182 182 3
The "G1" is just an indicator that this is a G1 row
The "AREAWAT" is an abbreviation of what information is provided
in this field (in the actual data file, eg STF1BxAK.F01); if you
want the full description, look for the "G2" row immediately
following the "G1" row:
G2 182 Area (water)
The "10" is the column length of the field.
The "A/N" probably represents whether the field value is a
number, a string, or something else, but I'm not entirely sure.
Both "182"s represent the starting column for the data. For the
"G" fields, these numbers are identical. Similar numbers will
differ for the "T" fields, described below.
Thus, the water area for the geographical area in a given record
is given in columns 182-191 (the 10 columns starting at column 182).
Note that the next field
G1 ANPSADPI 66 A/N 192 192 0 begins
at column 192, as we would expect.
For some "G" fields, like "AREAWAT", the following columns
simply provide a number. In others, however, the value of the
field is provided in a lookup table. Example:
G1 PSADC 2 A/N 289 289 0
G2 289 Political/Statistical Area Description Code
G3 289 01 State or State equivalent - no status is appended to the name
G3 289 01 of the entity in census publications and related data products
G3 289 01 .
G3 289 04 Borough - county equivalent in Alaska; "Borough" is appended t
G3 289 04 o the name of the entity in census publications and related da
G3 289 04 ta products.
G3 289 05 Census area - county equivalent in Alaska; "Census Area" is ap
G3 289 05 pended to the name of the entity in census publications and re
G3 289 05 lated data products.
G3 289 06 County - "County" is appended to the name of the entity in cen
G3 289 06 sus publications and related data products.
If the value of the field in column 289 (namely "PSADC" or
"Political/Statistical Area Description Code", which extends to column
290 since it's a two-column field) is "05", it means:
Census area - county equivalent in Alaska; "Census Area" is appended
to the name of the entity in census publications and related data
Note that the description is broken across 3 rows, since G3 rows are
at most 81 characters in length.
- "T" records are somewhat similar:
T1 P22 5646 841 9 0 37 1
T2 P22 RELATIONSHIP AND AGE
and also starting on page 37-47 of the PDF file you provided.
The 5646 indicates this field starts at column 5646 if you
consider the two lines that constitute a record as a single
line. If you consider the second line just by itself, this field
starts at column 841.
The 9 indicates that each value in this field is 9 characters
long (but see next point).
The 37 indicates there are 37 values packed into this field.
I don't know what the "0" and "1" mean.
Note that 37 values at 9 characters each is 333 characters
total, so we would expect the next "T" field to start at 5646+333
= 5979, which it does:
T1 P23 5979 1174 9 0 12 1
- The first "T4" row in STF1CRDD.ASC for each "T" row, summarizes
the name of the field and the number of values:
T4 P22 RELATIONSHIP AND AGE 37
- The next few rows tell what 37 values are given. Note that rows
ending with ":" are just headers, and not actual values. For
T4 P22 In households:
T4 P22 Householder or spouse
T4 P22 Related child:
T4 P22 Own child:
T4 P22 Under 3 years
T4 P22 3 and 4 years
means the first of the 37 values gives (namely, the values from column
5979-5987, since each value has 9 characters) is the number of
households reporting another householder or spouse living with the
person who filled out the Census questionnaire. Note that we ignore
the "In households:" row, since it ends in a colon.
The next 9 columns indicate the number of households with a child
under 3 years old where the child is related to the person filling out
the Census (thus, "related child:") and, in fact, the direct
descendant of the person filling out the Census ("Own child:").
Again, the "Related child:" and "Own child:" do not take up any
columns in the data file. If you count the number of non-colon lines
with "T4 P22" (and exclude the first line which indicates the number
of values), you'll see that it's exactly 37.
Note: I've taken minor liberties with formatting, such as reducing
multiple spaces to a single space.
DISCLAIMER: The above may not be 100% accurate.
Other possibly helpful links I ran across (some of these have subsets of the above data in different formats):