Information:
Mathematical data information is used with
cartographic materials to assist in determining scale,
coordinates, and equinox. In the MARC record this
information is entered into the 255 tag in text form
and into the 034 tag in coded form. Coded information
entered in the 034 tag corresponds with the
information entered in the 255 tag.
The 034 tag contains many possible subfields, but only
a few can be used with each type of cartographic
material. With most maps, atlases, and globes,
subfields a, b, d, e, f, and g will be appropriate. A
relief map or model may use these plus subfield c. For
celestial charts use subfields a, h, j, k, m, n, and
p.
Subfield a contains a code for the category of scale.
Use code a for most maps and globes. Code b is used
with celestial charts. Code z stands for other types
of scales including time scales and statistical
scales.
Subfield b contains a coded form of the scale found in
tag 255 subfield a. When more than one horizontal
scale is given, repeat subfield b.
Subfield c contains the coded form of the vertical
scale of a relief model or map. This scale would also
be represented in the 255 tag subfield a.
Subfields d, e, f, and g contain the coordinates of a
map. Each subfield is eight characters with the first
character being a letter code for the hemisphere
(North, South, East, and West). The letter is followed
by a number, three digits for the degree, two digits
for the minute, and two digits for the second.
Subfield h contains the angular scale for a celestial
chart.
Subfields j, k, m, and n are used to enter codes for
the right ascension and declination recorded in
subfield d of the 255 tag.
Subfield p contains the equinox as a coded form of the
year. It is entered with four digits representing the
year and may be followed by a decimal point and two
digits for the month.
Indicators
First Type of scale
0 Scale indeterminable/No scale recorded
1 Single scale
3 Range of scales
Second Type of ring
blank Not applicable
Subfields
a Category of scale (NR)
b Constant ratio linear horizontal scale (R)
c Constant ratio linear vertical scale (R)
d Coordinates - westernmost longitude (NR)
e Coordinates - easternmost longitude (NR)
f Coordinates - northernmost latitude (NR)
g Coordinates - southernmost latitude (NR)
h Angular scale (R)
j Declination - northern limit (NR)
k Declination - southern limit (NR)
m Right ascension - eastern limit (NR)
n Right ascension - western limit (NR)
p Equinox (NR)
Punctuation
There is no mark of punctuation at the end of this
tag.
Examples:
Maps, atlases, and globes
034 1 _aa
_b7500000
255 _aScale 1:7,500,000.
034 3 _aa
_b18000
_b28000
255 _aScales vary from 1:18000 to 1:28000.
No 034 entered
255 _aScale not given.
255 _aScale varies.
034 entered
034 1 _aa
_b13835000
255 _aScale [ca. 1:13,835,000]. 1 cm. = 138
km. 1 in. = 218 miles ;
_bChamberlin trimetric proj.
034 1 _a
_b250000
_dE0323000
_eE0343000
_fN0353000
_gN0350000
255 _a1:250,000
_c(E 32(30'--E34(30'/N35(30'--N 35(00').
A relief map
034 1 _aa
_b6336000
_c192000
255 _aScale [1:6,336,000]. 1 in. = 100 miles.
Vertical scale [1:192,000]. 1/16 in. =
approx. 1000'.
A celestial chart with right ascension of
center and declination of center given in the 255
field
034 1 _a
_h88
_jN0300000
_kN0300000
_m160000
_n160000
_p1973
255 _aScale 88 mm per 1(
_d(RA 16 hr./Decl. +30( ;
_eeq. 1973).
A celestial chart with right ascension and
declination given as limits in the 255 field
034 0 _ab
_jN0900000
_kS0900000
_m000000
_n240000
_p1980
255 _aScale not given
_d(RA 0 hr. to 24 hr./Decl. +90( to -90( ;
_eeq. 1980).
034 0 _ab
_p1986
255 _aScales vary
_e(eq. 1986).
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