| First Indicator | Second Indicator |
|---|---|
| Code source # - Library of Congress Classification 1 - U.S. Dept. of Defense Classification 7 - Source specified in subfield $2 |
Undefined # - Undefined |
| Subfield Codes | |
|---|---|
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Geographic classification code that represents the geographic area and, if applicable, the geographic subarea and populated place name covered by an item.
Code can provide more precise geographic access than the codes contained in field 043 (Geographic Area Code). Each main geographic area code and any related subarea codes associated with the item are contained in a separate 052 field. Subfield $d (Populated Place Name) may contain the name of the geographic area.
First Indicator - Code source
Code source in subfield $a and information in the other subfields.
Geographic classification code is derived from the Library of Congress Classification-Class G and expanded Cutter number lists for place names. The geographic classification code contains a four to six-character numeric code that consists of the appropriate classification number from the range G3190-G9980 by dropping the letter G. Cutter numbers for place names in the United States are also published in Geographic Cutters. The Library of Congress maintains the Library of Congress Classification, Geographic Cutters, and the Cutter number lists.
Code is from the U.S. Department of Defense Classification system.
Number is taken from a classification system other than that specified by one of the other defined indicator values and for which an identifying source code is given in subfield $2.
Second Indicator - Undefined
Undefined and contains a blank (#).
$a - Geographic classification area code
Numeric or alphanumeric code that represents the main geographic area covered by an item.
| 651 | #0$aNew York (State)$vMaps. | ||||||||
| 651 | #0$aNew Jersey$vMaps. | ||||||||
| 052 | ##$a3800 | ||||||||
| 052 | ##$a3810 | ||||||||
| 651 | #0$aBosnia and Hercegovina$vMaps. | ||||||||
| 052 | 1#$aBK | ||||||||
$b - Geographic classification subarea code
Geographic subarea code related to the geographic area coded in subfield $a.
Each geographic subarea code is contained in a separate subfield $b. Subfield $b may be repeated for subareas falling within a main area with the same code.
| 651 | #0$aRichmond (Tex.)$vMaps. | ||||||||
| 651 | #0$aRosenberg (Tex.)$vMaps. | ||||||||
| 651 | #0$aFort Bend County (Tex.)$vMaps. | ||||||||
| 052 | ##$a4034$bR4$bR8 | ||||||||
| 052 | ##$a4033$bF65 | ||||||||
| 651 | #0$aVirginia$xMaps. | ||||||||
| 052 | 1#$aUS$b51 | ||||||||
$d - Populated place name
Approved form of name for a populated place.
In the case of a name established by the U.S. Board on Geographic Names, if a short form of the name has been approved, that form is used in preference to the full form of name.
| 651 | #0$aMostar (Bosnia and Hercegovina)$vMaps. | ||||||||
| 052 | 1#$aBK$dMostar | ||||||||
$0 - Authority record control number or standard number
See description of this subfield in Appendix A: Control Subfields.
$1 - Real World Object URI
See description of this subfield in Appendix A: Control Subfields.
$2 - Code source
MARC code for the source of the geographic classification. Code from: Classification Scheme Source Codes.
$6 - Linkage
See description of this subfield in Appendix A: Control Subfields.
$8 - Field link and sequence number
See description of this subfield in Appendix A: Control Subfields.
Punctuation - Period that usually precedes a Cutter number is omitted in subfield $b. Field 052 does not end with a period.
Capitalization - Alphabetic characters are recorded in uppercase.
Records created prior to 2000 may contain a code # meaning undefined.
First indicator value 0 (U.S. Dept. of Defense Classification) was made obsolete. Value 1 was defined as U.S. Dept. of Defense Classification to replace it.
Subfield $c was made obsolete in the maps specifications in 1980. Subject content descriptors are contained in the 6XX fields.