[TIKA-4067] Add magic for ASPRS Lidar data

• Type: Sub-task
• Status: Reopened
• Priority: Minor
• Resolution: Unresolved
• Assignee: Unassigned
• Reporter: Gregory Lepore
• Created: 13/Jun/23 13:11
• Updated: 26/Oct/23 17:16

Description

The ASPRS Lidar data format occurs over 11,000 times in the latest Common Crawl dataset. There are three signatures to cover the three major versions. There does not appear to be a mime type that covers this format.

The full signatures are below, but they can be simplified to:

 

4C415346{20}01(00|01|02)

 

which is ASCII LASF, followed after 20 bytes by one of 0100, 0101, or 0102 for versions 1.0, 1.1, and 1.2.

 

https://www.nationalarchives.gov.uk/PRONOM/fmt/370

 

External signatures	File extension: las File extension: laz
Internal signatures
Name	ASPRS Lidar Data Exchange Format 1.0
Description	ASCII header: LASF, followed after 20 bytes by version number 1.0
Byte sequences
Position type	Absolute from BOF
Offset	0
Byte order
Value	4C415346{20}0100{78}[00:99]

 

External signatures	File extension: las File extension: laz
Internal signatures
Name	ASPRS Lidar Data Exchange Format 1.1
Description	ASCII header: LASF, followed after 20 bytes by version number 1.1
Byte sequences
Position type	Absolute from BOF
Offset	0
Byte order
Value	4C415346{20}0101{78}[00:99]

 

External signatures	File extension: las File extension: laz
Internal signatures
Name	ASPRS Lidar Data Exchange Format 1.2
Description	ASCII header: LASF, followed after 20 bytes by version number 1.2
Byte sequences
Position type	Absolute from BOF
Offset	0
Byte order
Value	4C415346{20}0102{78}[00:99]