Export UBC DCINV2D/IPINV2D Format

Use the IP & Resistivity > Export > UBC DCINV2D/IPINV2D Format option, (geogxnet.dll(Geosoft.GX.IP.ExportUBC;Run)*), to export RES or IP data file for use in the DCINV2D/IPINV2D inversion programs.

UBC IP Export dialog options

UBC format

You can export to one of 2 UBC formats, Version 3 or Version 5.

Data type

Select one of RES (for DCINV2D), IP (for IPINV2D) or "RES and IP" for both.

Script Parameter: IP_EXPORT_UBC.TYPE: (RES, IP, or "RES and IP")

Voltage channel:

Required, along with the current channel for the RES export. The output values in the DAT file are in normalized voltage (V/A). If the units are defined in the voltage and current channels, then conversions (mV -> V, mA ->A) are done automatically.

Script Parameter: IP_EXPORT_UBC.VOLTAGE_CHAN

Current channel:

Required, along with the voltage channel for the RES export. The output values in the DAT file are in normalized voltage (V/A). If the units are defined in the voltage and current channels, then conversions (mV -> V, mA ->A) are done automatically.

Script Parameter: IP_EXPORT_UBC.CURRENT_CHAN

IP channel:

Required for the UBC modeling.

Script Parameter: IP_EXPORT_UBC.IP_CHAN

Line selection:

Select which lines to export.

Script Parameter: IP_EXPORT_UBC.LINES (S:Selected, D:Displayed, "A" All)

Output directory:

By default, files are written to the Geosoft Project workspace. Use the browse tool to specify a different location for output files.

Script Parameter: IP_EXPORT_UBC.DIRECTORY

Write control files

Check this box to output a control (INP) file for each output line. Uses the values in the "RES" and "IP" tabs to set options for the control files.

Script Parameter: IP_EXPORT_UBC.CONTROL_FILE (checked 1, unchecked 0)

Save lines in separate directories

This is an option that facilitates setting up for UBC inversion. If selected, all files are named similarly, but each line is saved in a subdirectory named after the line. Otherwise all lines are saved in the same directory and prepended by the line number.

Script Parameter: IP_EXPORT_UBC. SEPARATE_DIRECTORIES (checked 1, unchecked 0)

More

Open/Close the control file parameter tabs.

RES Tab: DCINV2D Control File Parameters

Iterations:

Set the iterations for the inversion.

Script Parameter: IP_EXPORT_UBC.RES_NITER (default 30)

Iterations restart:

Set the iterations restart value for the inversion.

Script Parameter: IP_EXPORT_UBC.RES_IREST (default 30)

Chi factor:

Set chi factor value for the inversion.

Script Parameter: IP_EXPORT_UBC.RES_CHI_FACTOR (default 1.0)

Mesh [file]:

Version 3: Set the mesh file for the inversion. This value is not required.

Script Parameter: IP_EXPORT_UBC.RES_MESH_FILE

Version 5: The mesh for the inversion can be specified as a file, a value or simply default. This value is not required.

Script Parameter: IP_EXPORT_UBC.RES_MESH_SELECTION(Default 0, File 1, Value 2)

Script Parameter: IP_EXPORT_UBC.RES_MESH_FILE

Script Parameter: IP_EXPORT_UBC.RES_MESH_VALUE

Reference conductivity:

Version 3: Set the reference model conductivity to begin the inversion at. If no value is input, then one is calculated using values in the "ResCalc" channel for each line. The resistivity values are converted to conductivities, then a value equal to the mean conductivity plus 2.5 standard deviations is used.

Script Parameter: IP_EXPORT_UBC.RES_REFERENCE_CONDUCTIVITY

Version 5: The reference conductivity can be provided as a file, a value, or simply default. The second parameter for the reference conductivity depends on this selection. The default is calculated as in Version 3.

Script Parameter: IP_EXPORT_UBC.RES_REFERENCE_MODEL_SELECTION(Default 0, File 1, Value 2)

Script Parameter: IP_EXPORT_UBC.RES_ REFERENCE_MODEL _FILE

Script Parameter: IP_EXPORT_UBC.RES_ REFERENCE_MODEL _VALUE

Alphas:

Version 3: Set the alpha values for the inversion. Normally 3 values are entered. Note: No validation is done on these values; the numbers are output exactly as entered.

Script Parameter: IP_EXPORT_UBC.RES_ALPHAS

Version 5: Similarly to the above two parameters this parameter can be provided as a file, a set of 3 values, or simply default.

Script Parameter: IP_EXPORT_UBC.RES_ ALPHAS_SELECTION(Default 0, File 1, Value 2)

Script Parameter: IP_EXPORT_UBC.RES_ ALPHAS _ FILE

Script Parameter: IP_EXPORT_UBC.RES_ ALPHAS _VALUE

Weight file:

Set the weight file for the inversion. This value is not required.

Script Parameter: IP_EXPORT_UBC.RES_WEIGHT_FILE

IP Tab: IPINV2D Control File Parameters

Iterations:

Set the iterations for the inversion.

Script Parameter: IP_EXPORT_UBC.IP_NITER (default 30)

Iterations restart:

Set the iterations restart value for the inversion.

Script Parameter: IP_EXPORT_UBC.IP_IREST (default 30)

Chi factor:

Set chi factor value for the inversion.

Script Parameter: IP_EXPORT_UBC.IP_CHI_FACTOR (default 1.0)

[Conductivity file |

Resistivity inverted Conductivity]:

Version 3: Set the conductivity file for the inversion. By default the file output by the DCINV2D program is used (dcinv2d.con).

Script Parameter: IP_EXPORT_UBC.IP_CONDUCTIVITY_FILE

Version 5: The resistivity inverted conductivity can be provided as a file, a value, or set to none. The second parameter for the reference conductivity depends on this selection. The default is calculated as in Version 3.

Script Parameter: IP_EXPORT_UBC.IP_CONDUCTIVITY _SELECTION(Default 0, File 1, Value 2)

Script Parameter: IP_EXPORT_UBC.IP_CONDUCTIVITY _FILE

Script Parameter: IP_EXPORT_UBC.IP_CONDUCTIVITY _VALUE

Mesh [file]:

Version 3: Set the mesh file for the inversion. By default the file output by the DCINV2D program is used (dcinv2d.msh).

Script Parameter: IP_EXPORT_UBC.IP_MESH_FILE

Version 5: The mesh for the inversion can be specified as a file, a value or simply default. This value is not required.

Script Parameter: IP_EXPORT_UBC.IP_MESH_SELECTION(Default 0, File 1, Value 2)

Script Parameter: IP_EXPORT_UBC.IP_MESH_FILE

Script Parameter: IP_EXPORT_UBC.IP_MESH_VALUE

Initial model [file]:

Version 3: Set the initial conductivity model file for the inversion. This value is not required.

Script Parameter: IP_EXPORT_UBC.IP_INITIAL_MODEL_FILE

Version 5: The initial conductivity can be provided as a file, a value, or simply default. The second parameter for the reference conductivity depends on this selection. The default is calculated as in Version 3.

Script Parameter: IP_EXPORT_UBC.IP_INITIAL_MODEL _SELECTION(Default 0, File 1, Value 2)

Script Parameter: IP_EXPORT_UBC.IP_INITIAL_MODEL _FILE

Script Parameter: IP_EXPORT_UBC.IP_INITIAL_MODEL _VALUE

Reference model file |

Reference Chargeability:

Version 3: Set the reference model file for the inversion. This value is not required.

Script Parameter: IP_EXPORT_UBC.IP_REFERENCE_MODEL_FILE

Version 5: The reference chargeability can be provided as a file, a value, or simply default. The second parameter for the reference conductivity depends on this selection. The default is calculated as in Version 3.

Script Parameter: IP_EXPORT_UBC.IP_REFERENCE_MODEL_SELECTION(Default 0, File 1, Value 2)

Script Parameter: IP_EXPORT_UBC.IP_ REFERENCE_MODEL _FILE

Script Parameter: IP_EXPORT_UBC.IP_ REFERENCE_MODEL _VALUE

Alphas:

Version 3: Set the alpha values for the inversion. Normally 3 values are entered. Note: No validation is done on these values; the numbers are output exactly as entered.

Script Parameter: IP_EXPORT_UBC.IP_ALPHAS

Version 5: Similarly to above this parameter can be provided as a file, a set of 3 values, or simply default.

Script Parameter: IP_EXPORT_UBC.IP_ ALPHAS_SELECTION(Default 0, File 1, Value 2)

Script Parameter: IP_EXPORT_UBC.IP_ ALPHAS _ FILE

Script Parameter: IP_EXPORT_UBC.IP_ ALPHAS _VALUE

Mesh file:

Set the weight file for the inversion. This value is not required.

Script Parameter: IP_EXPORT_UBC.IP_WEIGHT_FILE

UBC IP Export

The export produces the following files (examples assume lineS named L1300 & L1400):

Same directory Separate directories

RES:

Observation for DCINV2D L1300_ RES.DAT & L1400_ RES.DAT
Optional control file for DCINV2D L1300_ RES.inp & L1400_ RES.DAT
Topography for DCINV2D L1300_ TOPO.DAT & L1400_ RES.DAT

IP:

Observation for IPINV2D  L1300_ IP.DAT & L1400_ RES.DAT
Optional control file for IPINV2D L1300_ IP.INP & L1400_ RES.DAT
Topography for IPINV2D  L1300_ TOPO.DAT & L1400_ RES.DAT

RES:

Observation for DCINV2D L1300\ RES.DAT & L1400\RES.DAT
Optional control file for DCINV2D L1300\RES.inp & L1400\RES.INP
Topography for DCINV2D L1300\TOPO.DAT & L1400\TOPO.DAT

IP:

Observation for IPINV2D L1300\ IP.DAT & L1400\IP.DAT
Optional control file for IPINV2D  L1300\IP.INP & L1400\IP.INP
Topography for IPINV2D  L1300\TOPO.DAT &  L1400\TOPO.DAT

 

 

*The GX.NET tools are embedded in the geogxnet.dll file located in the \Geosoft\Desktop Applications\bin folder. To run this GX interactively (outside the menu), first navigate to the bin directory and provide the GX.NET tool in the specified format. See the Run GX topic for more guidance.