This section describes the SEG-Y revisions supported by Geocap.
SEG Y (1975)
This standard is covered. Any file stored on this format will be read by the SEGY-Tool.
SEG Y Revision 1 (2002)
This standard is covered with the exception of:
- Extended textual file header
The Extended textual file header defined in Revision 1 allows for one or more 3200-byte records and provides additional space for recording required information about the SEG Y file.
Attempting to read a file stored on this format with an extended file header will cause the SEGY-Tool to fail.
SEG Y Revision 2 (2017)
This standard is not covered.
Most of the changes for Revision 2 involves data precision. The format, for example, allows for data to be stored as 8 byte samples.
In addition, trace headers can extend their previously fixed 240-byte size.
Files on this format that utilizes new Revision 2 functionality cannot be read by the SEGY-Tool.
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