Format
CALS Compressed Bitmap
Summary
- Name
- CALS Compressed Bitmap
- Identifiers
- PUID: x-fmt/28
- Format type
- Image (Raster)
- Description
- CAL is an image file format used by CALS. CAL files are compressed bitmap formatted files used for storing monochrome images. CAL files were developed in the 1980s to standardize graphics data interchange for electronic publishing for the federal government.
- Format encoding
- Text
- File extensions
-
cal - Submitted by
- Digital Preservation Department / The National Archives
Internal signatures
CALS Compressed Bitmap
- Description
- First record identifier in the CALS Header Block: srcdocid:
- Provenance
- Signature identified by Georgia Tech Research Institute (Candidate Internal Signatures for File Formats in PRONOM Registry; 05/06/2010).
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- None
- Byte Sequence
737263646F6369643A- Endianness
- None