| First Indicator | Second Indicator |
|---|---|
| Undefined # - Undefined |
Undefined # - Undefined |
| Subfield Codes | |
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Mathematical data associated with cartographic material, including celestial charts. This data may also be coded in field 034 (Coded Mathematical Data).
Data 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.
$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 $b.
| 255 | ##$aScale not given. | ||||||||
| 255 | ##$aScale [ca. 1:90,000]. | ||||||||
| 255 | ##$aScale [1:6,336,000]. 1" = 100 miles. Vertical scale [1:192,000]. 1/16" = approx. 1000'. | ||||||||
| 255 | ##$aScale not given ;$bConic proj. | ||||||||
$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 $e.
| 255 | ##$aScale [ca. 1:500,000] ;$bBase fitted to Lambert conformal conic proj. based on standard parallels of 33° and 45°. | ||||||||
| 255 | ##$aScale [ca. 1:13,835,000]. 1 cm. = 138 km. 1 in. = 218 miles ;$bChamberlin trimetric proj. | ||||||||
| 255 | ##$aScale 1:22,000,000 ;$bConic proj.$c(E 72°--E 148°/N 13°--N 18°). | ||||||||
$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 $c data are enclosed in parentheses. The two longitude statements and the two latitude statements are each separated by two hyphens (--). The longitude is separated from the latitude by a slash (/).
| 255 | ##$aScale 1:7,500,000$c(W 125°--W 65°/N 49°--N 25°). | ||||||||
| 255 | ##$aScale 1:250,000$c(E 32°30'--E 34°30'/N 35°30'--N 35°00'). | ||||||||
| 255 | ##$aScale [ca. 1:10,000] ;$bGauss proj.$c(W 9°13'52"--W 9°04'47"/N 38°48'35"--N 38°41'29"). | ||||||||
$d - Statement of zone
Used for celestial charts.
In records formulated according to ISBD principles, subfield $d data, along with any subfield $e data, are enclosed in parentheses.
| 255 | ##$aScales vary$d(Zones +90° to +81° to 63°, -81° to 98° ;$eeq. 1950). | ||||||||
| 255 | ##$aScale 88 mm per 1°$d(RA 16 hr./Decl. +30° ;$eeq. 1973.50). | ||||||||
$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 $d data, are enclosed in parentheses.
| 255 | ##$aScale not given$d(RA 0 hr. to 24 hr./Decl. +90° to -90° ;$eeq. 1980). | ||||||||
| 255 | ##$aScales vary$e(Eq. 1986.00). | ||||||||
$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.
$6 - Linkage
See description of this subfield in Appendix A: Control Subfields.
$7 - Data provenance
See description of this subfield in Appendix J: Data Provenance Subfields.
$8 - Field link and sequence number
See description of this subfield in Appendix A: Control Subfields.
Punctuation - Field 255 ends with a period. See also subfield descriptions for punctuation information.