Format
Log ASCII Standard Format
Summary
- Name
- Log ASCII Standard Format
- Version
- 1.2
- Identifiers
- PUID: fmt/389
- Format type
-
- Text (Structured)
- Dataset
- Description
- This is an outline record only, and requires further details, research or authentication to provide information that will enable users to further understand the format and to assess digital preservation risks associated with it if appropriate. If you are able to help by supplying any additional information concerning this entry, please return to the main PRONOM page and select ‘Add an Entry’.
- Note
- Specifications available at: http://www.cwls.org/las_info.php
- File extensions
-
las - Source
- Digital Preservation Department / The National Archives
- Developed by
- Canadian Well Logging Society / Canadian Well Logging Society
Relationships
- Is previous version of
Internal signatures
Log ASCII Standard 1.2
- Note
- Header ASCII: ~V followed by version and standard information (VERS. 1.2 CWLS (LOG ASCII STANDARD||Log ASCII standard|LAS) V(ERSION|ersion) 1.2) and then mandatory logging data recorded in Well Information Section (~W), Curve Information section (~C), and ASCII Log Data section (~A).696F6E)20312E32*7E57*7E43*7E41
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- 148
- Byte Sequence
7E56*564552532E*312E32{0-1}3A{0-5}43574C5320(4C4F47204153434949205354414E44415244|4C6F67204153434949205374616E64617264|6C6F67204153434949205374616E64617264|4C4153){1-3}56(455253494F4E|657273696F6E)20312E32*7E57*7E43*7E41- Endianness
- None
Changelog
-
Updated in V114
- Release date
- 22 August 2023
Log ASCII Standard 1.2: Offset added to signature to accomodate header. Submitted by The National Library of Australia.
-
Updated in V105
- Release date
- 29 June 2022
Log ASCII Standard Format: Expanded optional bytes from 0-3 to 0-5 and added optional 'Log ASCII Standard' magic bytes. Submitted by The National Library of Australia.
-
Added in V55
- Release date
- 4 January 2012
Log ASCII Standard Format 1.2: Signature developed through PRONOM Research.
Log ASCII Standard Format 1.2: Outline entry added.