255 - Cartographic Mathematical Data (R)
MARC 21 Bibliographic - Full
February 1999
First Indicator
Undefined
# - Undefined
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Second Indicator
Undefined
# - Undefined
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Subfield Codes
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$a - Statement of scale (NR)
$b - Statement of projection (NR)
$c - Statement of coordinates (NR)
$d - Statement of zone (NR)
$e - Statement of equinox (NR)
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$f - Outer G-ring coordinate pairs (NR)
$g - Exclusion G-ring coordinate pairs (NR)
$6 - Linkage (NR)
$8 - Field link and sequence number (R)
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FIELD DEFINITION AND SCOPE
Mathematical data associated with cartographic material, including celestial charts. This
data may also be coded in field 034 (Coded Mathematical Data).
Date recorded includes a statement of scale, statement of projection and/or a statement
of bounding coordinates. The coordinates can represent a bounding rectangle, the outline
of the area covered, and/or the outline of an interior area not covered. For celestial
charts, it may also contain a statement of zone, declination data, and/or right
ascension data, and/or equinox.
GUIDELINES FOR APPLYING CONTENT DESIGNATORS
■ INDICATORS
- Both indicator positions are undefined; each contains a blank (#).
■ SUBFIELD CODES
$a - Statement of scale Entire scale statement including any equivalency statements, vertical scales or
vertical exaggeration statements for relief models and other three-dimensional
items.
In records formulated according to ISBD principles, subfield $a
includes all data up to and including the semicolon (;) when subfield
$a is followed by subfield $b.
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| 255 |
##$aScale not given.
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| 255 |
##$aScale [ca. 1:90,000].
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| 255 |
##$aScale [1:6,336,000]. 1" = 100 miles. Vertical scale
[1:192,000]. 1/16" = approx. 1000'.
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| 255 |
##$aScale not given ;$bConic proj.
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$b - Statement of projection Entire projection statement. In records formulated according to ISBD principles,
subfield $b includes all data following the semicolon (;) and up to but
not including the opening parenthesis (() that introduces subfields $c,
$d, and/or $e.
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| 255 |
##$aScale [ca. 1:500,000] ;$bBase fitted to Lambert conformal conic proj. based on
standard parallels of 33° and 45°.
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| 255 |
##$aScale [ca. 1:13,835,000]. 1 cm. = 138 km. 1 in. = 218
miles ;$bChamberlin trimetric proj.
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| 255 |
##$aScale 1:22,000,000 ;$bConic proj.$c(E 72°--E 148°/N 13°--N 18°).
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$c - Statement of coordinates Coordinates are recorded in the order of westernmost longitude, easternmost
longitude, northernmost latitude, and southernmost latitude.
In records formulated according to ISBD principles, subfield $c data
are enclosed in parentheses. The two longitude statements and the two latitude
statements are each separated by two hyphens (--). The longitude is separated from
the latitude by a slash (/).
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| 255 |
##$aScale 1:7,500,000$c(W 125°--W 65°/N 49°--N 25°).
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| 255 |
##$aScale 1:250,000$c(E 32°30'--E 34°30'/N 35°30'--N
35°00').
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| 255 |
##$aScale [ca. 1:10,000] ;$bGauss proj.$c(W 9°13'52"--W 9°04'47"/N 38°48'35"--N
38°41'29").
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$d - Statement of zone Used for celestial charts.
In records formulated according to ISBD principles, subfield $d data,
along with any subfield $e data, are enclosed in parentheses.
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| 255 |
##$aScales vary$d(Zones +90° to +81° to 63°, -81° to 98° ;$eeq. 1950).
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| 255 |
##$aScale 88 mm per 1°$d(RA 16 hr./Decl. +30° ;$eeq. 1973.50).
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$e - Statement of equinox Statement of equinox or epoch. In records formulated according to ISBD principles,
subfield $e data, along with any subfield $c or
$d data, are enclosed in parentheses.
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| 255 |
##$aScale not given$d(RA 0 hr. to 24 hr./Decl. +90° to -90° ;$eeq. 1980).
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| 255 |
##$aScales vary$e(Eq. 1986.00).
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$f - Outer G-ring coordinate pairs Coordinate pairs that identify the closed non-intersecting boundary of the area
covered.
$g - Exclusion G-ring coordinate pairs Coordinate pairs that identify the closed non-intersecting boundary of the area
contained within the G-polygon outer ring that is excluded.
$8 - Field link and sequence number
INPUT CONVENTIONS
Punctuation - Field 255 ends with a period. See also subfield descriptions for punctuation
information.