Character position definition and scope:

A one-character alphabetic code indicates the positive/negative aspect of the photocopy or film of the cartographic item.  This characteristic is also referred to as polarity.  A fill character ( | ) is used when no attempt has been made to code this position.

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

Guidelines for applying content designators:

Code:

Description:

a

Positive

b

Negative

m

Mixed polarity

n

Not applicable  Item is other than a photocopy or film.

|

Not attempt to code

Content designator history:

u - Unknown  [obsolete, 1997]  [CAN/MARC only]

To return, select:

007:  Map

007  Physical Description Fixed Field