255 Subfield $b - Statement of projection:

Subfield $b contains the 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.

Examples:

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°).