Library of Congress >> MARC >> Bibliographic >> 5XX >> 514

514 - Data Quality Note (NR)


MARC 21 Bibliographic - Full
October 2003

First Indicator
Undefined
# - Undefined

Second Indicator
Undefined
# - Undefined


Subfield Codes
$a - Attribute accuracy report (NR)
$b - Attribute accuracy value (R)
$c - Attribute accuracy explanation (R)
$d - Logical consistency report (NR)
$e - Completeness report (NR)
$f - Horizontal position accuracy report (NR)
$g - Horizontal position accuracy value (R)
$h - Horizontal position accuracy explanation (R)
$i - Vertical positional accuracy report (NR)
$j - Vertical positional accuracy value (R)
$k - Vertical positional accuracy explanation (R)
$m - Cloud cover (NR)
$u - Uniform Resource Identifier (R)
$z - Display note (R)
$6 - Linkage (NR)
$8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

Provides a general assessment of the quality of the data set constituting the item.

For cartographic material, recommendations on tests to be performed and information to be reported are found in the Spatial Data Transfer Standard (FIPS 173).


GUIDELINES FOR APPLYING CONTENT DESIGNATORS

INDICATORS

SUBFIELD CODES

$a - Attribute accuracy report
Explanation of the accuracy of the identification of the entities and assignments of values in the data set. It may also include a description of tests used to determine data quality.
$b - Attribute accuracy value
Estimate of the accuracy of the identification of the entities and assignments of values in the data set.
$c - Attribute accuracy explanation
Definition of the thematic accuracy measure.
$d - Logical consistency report
Explanation of the fidelity of the relationships in the data set and the tests used.
$e - Completeness report
Information about omissions, selection criteria, generalization, definitions used, and other rules used to derive the data set.
$f - Horizontal position accuracy report
Explanation of the accuracy of the horizontal coordinate measurements and a description of the tests used. The use of this subfield is usually limited to cartographic items.
$g - Horizontal position accuracy value
Estimate of the accuracy of the horizontal coordinate measurements in the data set expressed in (ground) meters. The use of this subfield is usually limited to cartographic items.
$h - Horizontal position accuracy explanation
Definition of the horizontal positional accuracy measure. The use of this subfield is usually limited to cartographic items.
$i - Vertical positional accuracy report
Explanation of the accuracy of the vertical coordinate measurements and a description of the tests used. The use of this subfield is usually limited to cartographic items.
$j - Vertical positional accuracy value
Estimate of the accuracy of the vertical coordinate measurement in the data set expressed in (ground) meters. The use of this subfield is usually limited to cartographic items.
$k - Vertical positional accuracy explanation
Definition of the vertical positional accuracy measure. The use of this subfield is usually limited to cartographic items.
$m - Cloud cover
Area of a data set obstructed by clouds, expressed as a percentage of the geospatial extent. The use of this subfield is usually limited to cartographic items.
$u - Uniform Resource Identifier
Uniform Resource Identifier (URI), for example a URL or URN, which provides electronic access data in a standard syntax. This data can be used for automated access to an electronic item using one of the Internet protocols.
$z - Display note
Introduces the data in the field, when needed.
$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.

EXAMPLES

514 ##$bEstimated to be 98.5%.$cVillage names compared to source map -- all match, therefore errors are possible only if source maps are incorrect.$dNode-to-line, line-to-area topological relationships maintained. Line and area attributes maintained. GRASS 4.0 program "v.support" checks topological relationships.$eAll incorporated limits shown on USGS quads were digitized.$fThe accuracy of this data is based upon the use of the source maps ... [subfield $f shortened in this example]
514 ##$aThe map layer that displays Special Feature Symbols shows the approximate location of small (less than 2 acres in size) areas of soils ... [subfield $a shortened in this example] $dQuarter quadrangles edited and joined internally and to surrounding quads. All known errors corrected.$eThe combination of spatial linework layer, Special Feature Symbols layer, and attribute data are considered a complete SSURGO dataset.$fThe actual on ground transition between the area represented by the Special Feature Symbol and the surrounding soils generally is very narrow with a well defined edge. The center of the feature area was compiled and digitized as a point. The same standards for compilation and digitizing used for line data were applied to the development of the Special Feature Symbols layer.
514 ##$bApproximately 95%
514 ##$aHorizontal position accuracy 1-3 meters$fDifferential GPS$g3 meters$hStatic tests$iBar test$jOne foot$kBar check.
514 ##$zCompleteness:$u<URI>

INPUT CONVENTIONS

Punctuation - Field 514 ends with a period unless another mark of punctuation is present.

CONTENT DESIGNATOR HISTORY

$u - Uniform Resource Identifier [NEW, 2000]
$z - Display note [NEW, 2000]

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