Binary (Unformatted) Data Type

The type of binary data generated by MODFLOW-2000, MODFLOW-2000 GWT, MODFLOW-96, MOC3D, or MT3DMS depends on:

If you ran MODFLOW-2005, MODFLOW-2000, MODFLOW-2000 GWT, MODFLOW-96 or MOC3D on a computer with Microsoft Windows operating system, and you used the executable (.exe) program downloaded from the USGS Water Resources Applications website, please consult the following table on how to specify the binary data type.
Model Version The binary data type is:
MODFLOW-2005 1.2 and higher Binary (unstructured, non-formatted)
MODFLOW-2000 1.2 and higher Binary (unstructured, non-formatted)
1.0 and 1.1 Unformatted - Lahey Fortran 90 (LF90)
MODFLOW-2000 GWT 1.0.3 and higher Binary (unstructured, non-formatted)
1.0 - 1.0.2 Unformatted - Lahey Fortran 90 (LF90)
MODFLOW-96 all Unformatted - Lahey Fortran 90 (LF90)
MOC3D all Unformatted - Lahey Fortran 90 (LF90)

If you ran MT3DMS on a computer with Microsoft Windows operating system, and you used the executable (.exe) program downloaded from the MT3DMS website, please consult the following table on how to specify the binary data type.
Model The binary data type is:
MT3DMS Version 4.5, mt3dms4b.exe Binary (unstructured, non-formatted)
MT3DMS Version 4.5, mt3dms4s.exe Unformatted - Visual Fortran & LF95
MT3DMS Version 4 used with MODFLOW-2000 Binary (unstructured, non-formatted)
MT3DMS Version 4 used with MODFLOW-96 or 88 Unformatted - Lahey Fortran 90 (LF90)
MT3DMS Version 3.5 used with MODFLOW-96 or 88 Unformatted - Lahey Fortran 90 (LF90)

 

The following table provides information on how to specify the binary data type based on the ACCESS and FORM specifiers and the type of compiler.

Compiler ACCESS= FORM= The binary data type is:
Lahey Fortran 95 'SEQUENTIAL' 'BINARY' Binary (unstructured, non-formatted)
'SEQUENTIAL' 'UNFORMATTED' Unformatted - Visual Fortran & LF95
Lahey Fortran 90 'TRANSPARENT' 'UNFORMATTED' Binary (unstructured, non-formatted)
'SEQUENTIAL' 'UNFORMATTED' Unformatted - Lahey Fortran 90 (LF90)
Visual Fortran 'SEQUENTIAL' 'BINARY' Binary (unstructured, non-formatted)
'SEQUENTIAL' 'UNFORMATTED' Unformatted - Visual Fortran & LF95
Unix System 'SEQUENTIAL' 'UNFORMATTED' Big Endian - Unix