GPDEF
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IOGP P6/11 Seismic bin grid data exchange format – technical specification
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IOGP P2/11 positioning data exchange format – technical specification
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IOGP P1/11 geophysical position data exchange format – technical specification
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IOGP P6/11 Seismic Bin Grid Data Exchange Format – User Guide
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OGP P1/11 Geophysical position data exchange format – User Guide