Facsimiles:

Mathematical Data Area:

The transcription of the mathematical data are elements for a facsimile is based directly on the reproduction. Since scale information for a facsimile frequently differs from the original due to reduction or enlargement of the item during the reproduction process scale information on the facsimile should be verified (e.g., by measuring a bar scale, using degrees of latitude, etc.), whenever possible.

Mathematical data elements relating only to the original, if known or readily available, are transcribed in the appropriate location within the "original version" note (tag 534).