# obspy.io.segy.segy

Routines to read and write SEG Y rev 1 encoded seismic data files.

Public Functions

`autodetect_endian_and_sanity_check_su` | Takes an open file and tries to determine the endianness of a Seismic
`iread_segy` | Iteratively read a SEG-Y field and yield single ObsPy Traces.
`iread_su` | Iteratively read a SU field and yield single ObsPy Traces.

Private Functions

Warning

Private functions are mainly for internal/developer use and their API might change without notice.

`_internal_iread_segy` | Iteratively read a SEG-Y field and yield single ObsPy Traces.
`_internal_iread_su` | Iteratively read a SU field and yield single ObsPy Traces.
`_internal_read_segy` | Reads on open file object and returns a SEGYFile object.
`_internal_read_su` | Reads on open file object and returns a SUFile object.
`_read_segy` | Reads a SEG Y file and returns a SEGYFile object.
`_read_su` | Reads a Seismic Unix (SU) file and returns a SUFile object.

Classes

`SEGYBinaryFileHeader` | Parses the binary file header at the given starting position.
`SEGYFile` | Class that internally handles SEG Y files.
`SEGYTrace` | Convenience class that internally handles a single SEG Y trace.
`SEGYTraceHeader` | Convenience class that handles reading and writing of the trace headers.
`SUFile` | Convenience class that internally handles Seismic Unix data files. It

Exceptions

`SEGYError` | Base SEGY exception class.
`SEGYInvalidTextualHeaderWarning` | Warning that is raised if an invalid textual header is about to be written.
`SEGYTraceHeaderTooSmallError` | Raised if the trace header is not the required 240 byte long.
`SEGYTraceOnTheFlyDataUnpackingError` | Raised if attempting to unpack trace data but no `unpack_data()` function
`SEGYTraceReadingError` | Raised if there is not enough data left in the file to unpack the data
`SEGYWarning` | SEG Y warnings base class.
`SEGYWritingError` | Raised if the trace header is not the required 240 byte long.

### Thank you!

We would like to thank our contributors, whose efforts make this software what it is. These people have helped by writing code and documentation, and by testing. They have created and maintained this product, its associated libraries and applications, our build tools and our web sites.

#### Contributors

- Ackerley, Nick
- Allgeyer, Sebastien
- Ammon, Charles J.
- Antunes, Emanuel
- Arnarsson, Ólafur St.
- Bank, Markus
- Barsch, Robert
- Behr, Yannik
- Bernardi, Fabrizio
- Bernauer, Felix
- Bes de Berc, Maxime
- Beyreuther, Moritz
- Boltz, Shawn
- Bonaimé, Sébastien
- Carothers, Lloyd
- Chamberlain, Calum
- Chambers, Derrick
- Chen, Zhao
- Clark, Adam
- Danecek, Peter
- Egdorf, Sven
- Engels, Fabian
- Ermert, Laura
- Eulenfeld, Tom

- Fabbri, Tommaso
- Falco, Nicholas
- Fee, Jeremy
- Grellier, Clément
- Grunberg, Marc
- Hammer, Conny
- Heimann, Sebastian
- Heiniger, Lukas
- Hope, Gaute
- Igel, Heiner
- Inza, Adolfo
- Isken, Marius
- Ketchum, David
- Koymans, Mathijs
- Kremers, Simon
- Kress, Victor
- Krieger, Lars
- Krischer, Lion
- Kula, Damian
- Käufl, Paul
- Köhler, Andreas
- Lecocq, Thomas
- Leeman, John
- Legovini, Paride

- Lesage, Philippe
- Li, Yulin
- Lomax, Anthony
- Lopes, Rui L.
- MacCarthy, Jonathan
- Maggi, Alessia
- Martin, Henri
- Medlin, Andrew
- Megies, Tobias
- Meschede, Matthias
- Michelini, Alberto
- Miller, Nathaniel C.
- Morgenstern, Bernhard
- Nof, Ran Novitsky
- Panning, Mark P.
- Parker, Tom
- Pestourie, Romain
- Rapagnani, Giovanni
- Reyes, Celso
- Ringler, Adam
- Rothenhäusler, Nicolas
- Russo, Emiliano
- Sales de Andrade, Elliott

- Satriano, Claudio
- Saul, Joachim
- Scheingraber, Chris
- Schneider, Simon
- Sippl, Christian
- Snoke, Arthur
- Stange, Stefan
- Stähler, Simon C.
- Sullivan, Benjamin
- Tian, Dongdong
- Trabant, Chad
- Trani, Luca
- Uieda, Leonardo
- Walker, Andrew
- Walther, Marcus
- Wassermann, Joachim
- Williams, Mark C.
- Winkelman, Andrew
- Zaccarelli, Riccardo
- Zad, Seyed Kasra Hosseini
- Zhu, Lijun
- van Driel, Martin
- van Wijk, Kasper

#### Funds

ObsPy was partially funded by the

- German Science Foundation (DFG) via grant DFG IG 16/9-1
- German Ministry for Education and Research (BMBF), GEOTECHNOLOGIEN grant 03G0646H.
- NERA project (Network of European Research Infrastructures for Earthquake Risk Assessment and Mitigation) under the European Community's Seventh Framework Programme (FP7/2007-2013) grant agreement n° 262330
- Leibniz Institute for Applied Geophysics (LIAG)
- VERCE EU-FP7 project (no. 283543)