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# 342 - Geospatial Reference Data (R)

MARC 21 Bibliographic - Concise
2007

Description of the frame of reference for the coordinates in a data set. To work with a data set a user must be able to identify how location accuracy has been affected through the application of a geospatial reference method, thus enabling the user to manipulate the data set to recover location accuracy.

Indicators
First - Geospatial reference dimension
0 - Horizontal coordinate system
1 - Vertical coordinate system
Second - Geospatial reference method
0 - Geographic
1 - Map projection
2 - Grid coordinate system
3 - Local planar
4 - Local
5 - Geodetic model
6 - Altitude
7 - Method specified in \$2
8 - Depth
Subfield Codes
\$a - Name (NR)
\$b - Coordinate units or distance units (NR)
\$c - Latitude resolution (NR)
\$d - Longitude resolution (NR)
\$e - Standard parallel or oblique line latitude (R)
\$f - Oblique line longitude (R)
\$g - Longitude of central meridian or projection center (NR)
\$h - Latitude of projection center or projection origin (NR)
\$i - False easting (NR)
\$j - False northing (NR)
\$k - Scale factor (NR)
\$l - Height of perspective point above surface (NR)
\$m - Azimuthal angle (NR)
\$n - Azimuth measure point longitude or straight vertical longitude from pole (NR)
\$o - Landsat number and path number (NR)
\$p - Zone identifier (NR)
\$q - Ellipsoid name (NR)
\$r - Semi-major axis (NR)
\$s - Denominator of flattening ratio (NR)
\$t - Vertical resolution (NR)
\$u - Vertical encoding method (NR)
\$v - Local planar, local, or other projection or grid description (NR)
\$w - Local planar or local georeference information (NR)
\$2 - Reference method used (NR)
See description of this subfield in Appendix A: Control Subfields.
\$8 - Field link and sequence number (R)
See description of this subfield in Appendix A: Control Subfields.
Examples
 342 01\$aPolyconic\$g0.9996\$h0\$i500,000\$j0
 342 16\$aNational geodetic vertical datum of 1929\$v1\$bmeters\$wImplicit coordinates.
 342 00\$c0.0004\$d0.0004\$bDecimal degrees
 342 01\$aPolyconic\$g0.9996\$h0\$i500,000\$j0
 342 05\$sWorld geodetic system 72\$t6378135\$u298.26
 342 16\$aNational geodetic vertical datum of 1929\$v1\$bmeters\$wImplicit coordinates.
 342 18\$aLowest astronomical tide
 342 18\$aLowest astronomical tide
 342 16\$aNational geodetic vertical datum of 1929\$v1\$bmeters\$wImplicit coordinates.
 342 00\$c0.0004\$d0.0004\$bDecimal degrees
 342 05\$aWorld Geodetic System 1984 (WGS-84)\$c0.0000001\$d0.0000001\$bDegrees, Minutes, and Decimal seconds\$qWorld Geodetic System 1984 (WGS-84)\$r6378137.0\$s298.257223563
 342 01\$aPolyconic\$g0.9996\$h0\$i500,000\$j0
 342 02\$aUniversal Transverse Mercator\$p13\$k0.9996\$g-105.00\$h0.00\$i500,000\$j0.0
 342 02\$aState Plane Coordinate System 27, Lambert Conformal Conic\$p0405\$g-69.0\$h0.0\$i500000.0\$j0.0
 342 01\$aPolyconic\$g0.9996\$h0\$i500,000\$j0
 342 02\$aState Plane Coordinate System 27, Lambert Conformal Conic\$p0405\$g-69.0\$h0.0\$i500000.0\$j0.0
 342 03\$vMissouri East State Plane NAD27\$qClarke 1866\$r6378206.4 M\$s294.97869821
 342 05\$sWorld geodetic system 72\$t6378135\$u298.26
 342 18\$aNGVD 1929\$t0.01\$bfeet\$uExplicit depth coordinate included with horizontal coordinates