008/22-23 (006/05-06) Maps: Projection

Character position definition and scope:

A two-character alphabetic code that indicates the projection used in producing the item.

Specifically named projections are not described in this document. The presence of the name of the projection identifies the appropriate code for 008/22-23. Cartographic reference sources may be consulted for a more detailed explanation of specific projections.

Two fill characters ( || ) are used when no attempt has been made to code these character positions.

Record requirements for National-level and Minimal-level records: Optional.

Guidelines for applying content designators:

Code:	Description:
##	Projection not specified No projection is specified on the item. This code is used for most globes.
aa	Aitoff
ab	Gnomic
ac	Lambert's azimuthal equal area
ad	Orthographic
ae	Azimuthal equidistant
af	Stereographic
ag	General vertical near-sided
am	Modified stereographic for Alaska
an	Chamberlin trimetric
ap	Polar stereographic
au	Azimuthal, specific type unknown Only the projection type (azimuthal) is known, not the specific projection.
az	Azimuthal, other An azimuthal projection for which none of the other defined codes are appropriate.
ba	Gall
bb	Goode's homolographic
bc	Lambert's cylindrical equal area
bd	Mercator
be	Miller
bf	Mollweide
bg	Sinusoidal
bh	Transverse Mercator
bi	Gauss-Kruger
bj	Equirectangular
bk	Krovak
bl	Cassini-Soldner
bo	Oblique Mercator
br	Robinson
bs	Space oblique Mercator
bu	Cylindrical, specific type unknown Only the projection type (cylindrical) is known, not the specific projection.
bz	Cylindrical, other A cylindrical projection for which none of the other defined codes are appropriate.
ca	Alber's equal area
cb	Bonne
cc	Lambert's conformal conic
ce	Equidistant conic
cp	Polyconic
cu	Conic, specific type unknown Only the projection type (conic) is known, not the specific projection.
cz	Conic, other A conic projection for which none of the other defined codes are appropriate.
da	Armadillo
db	Butterfly
dc	Eckert
dd	Goode's homolosine
de	Miller's bipolar oblique conformal conic
df	Van Der Grinten
dg	Dimaxion
dh	Cordiform
dl	Lambert conformal
zz	Other A projection for which none of the other defined codes are appropriate.
\|\|	No attempt to code

Content designator history:

bk - Krovak [new, 2009]

bl - Cassini-Soldner [new, 2009]