Select the lines to grid; available options:

• All lines: All the lines will be processed.

• Displayed line: Only the currently displayed line will be gridded.

• Selected lines: All selected lines will be gridded (default option).

See the Application Notes below for further details.

Script Parameter: GRIDCDI.LINES [ "A" : All lines, "S" : Selected lines (default), "D" : Displayed line]

Select the channel containing the data array to grid.

The list is populated only with the array channels.

Script Parameter: GRIDCDI.DATA

If the depth increments are loaded onto the data array channel, this entry will be disabled. Otherwise, you can enter the depth array channel specifying the vertical location of each of the data elements to plot.

The entry is populated only with channels of the same dimension as the data array.

Script Parameter: CDI.DEPTH_ARRAY_CHAN

Check this option if the values in the depth array are specified in the same direction as elevation and decrease downward.

Script Parameter: CDI.NEGATIVE_DEPTHS_DOWN [0: unchecked (default), 1: checked]

Use this channel to define topography or a reference elevation. If defined, the depth or relative elevation values are added to these values to give the true elevation ("Z") of each data value.

Script Parameter: CDI.ELEVATION_CHAN

Specify a prefix for the output section grids. Adding a prefix to your output grids may help you to filter (or sort) your sections. By default, this field is left blank, and no prefix is added to the output section grids.

Each grid section name is concatenated using the optional prefix, the channel name, the line name, and the selected display gridding method.

Script Parameter: GRIDCDI.PREFIX

Select from one of the available options:

• Display grid: The output section grids will open in individual grid windows within the current project's workspace.

• Do not display: The output section grids will be added to the current project and listed in the Project Explorer, but they will not open in the project's workspace.

  The option overrides the Advanced Settings parameter "Display Created Grids" when its value is set to "True".

• 3D view: The output section grids will be added to the current 3D view and rendered in the viewer window. This option becomes available and is selected by default when a 3D view is open in the current workspace.

Script Parameter: GRIDCOPY.DISPLAY_OPTION ["Do not display" (default), "Display grid", "3D view"]

Gridding can be a resource-intensive task. The duration can range from minutes to hours, depending on the size of the dataset. By choosing the Run in background option, you can execute the gridding process asynchronously, allowing you to continue using Oasis montaj for other tasks while the gridding is underway. Multiple instances of the gridding process can run concurrently in the background, whether they are for the same database or different ones.

When you press the OK button with the Run in background option checked:

An Oasis montaj command-line window (OMS) will open and run in the background on the taskbar until the gridding task is complete. Oasis montaj becomes available immediately after the OMS console window is launched. Do not close the console window before the process finishes — this will cancel the gridding, and no output grid files will be produced. When the gridding process is complete, the console window will close automatically.

In the current Oasis montaj project, in the Project Explorer:

• You can monitor the progress of your gridding while working on other tasks.

  The progress of the gridding is monitored, and the status (e.g., processing, completed, failed, canceled) is visually indicated in the Jobs tab. A new node is appended to the tab, and entries for each of the output files are created under this node in the tree.

• As the gridding process for each selected line in the database completes, the output section grid is automatically added to the Grids node in the Data tab.

  You can double-click on the job node in the Jobs tab to initiate a rerun of the gridding using the previously set parameters. You also have the option to adjust these parameters before starting the process again.

Closing the project (or the Oasis montaj instance) while background gridding is in progress will display a confirmation prompt. If you choose to close the project while the oms.exe is running in the background, the process will continue to execute to completion.

The selection state of the Run in background option is retained on subsequent runs of the gridding tool in the same project.

More

Select this button to reveal the parameters under the Display and Grid sections.

Display

Specify the colour zoning method for rendering colour distributions. Select one of the options below:

• As last displayed: the grid is displayed in its last viewed state: its previous colour transform is used, and the currently selected colour scheme will be ignored.

• Default: the default colour distribution method is used.

• Histogram equalization: your data values are evaluated, and the zones are statistically determined, such that data is equally divided among the histogram bins.
• Normal distribution: your data is assumed to be normally distributed, and the zones are determined based on the standard distribution for a standard bell curve.
• Linear: the range of data values are divided linearly into even increments.
• Log-Linear: the zone values are updated based on the log distribution of the data, and the data is displayed using the log-linear colour distribution.

Script Parameter: GRIDCDI.METHOD [0 : Default, 1: Linear, 2 : Normal distribution, 3 : Histogram equalization, 5 : Log-Linear, 6 : As last displayed]

Select the colours for rendering the image of the grids. To modify the selection, click on the Colours scheme, and the Select Colour Scheme dialog will appear. Use this dialog to navigate through the scheme categories and to select a colour scheme to best display your grid(s).

Script Parameter: GRIDCDI.TABLE

Specify the brightness of the grid image. The normal brightness is defined at 0. You can change the Brightness value from -100 (black) to 100 (white) using either the slider bar or by entering an exact value.

Script Parameter: GRIDCDI.BRIGHTNESS

Check the Reverse colour distribution option to reverse the distribution of the selected colour scheme.

For example, the colour scheme used for displaying resistivity data is the inverse of the scheme used for conductivity data. By enabling you to reverse the colour scheme on the fly, the same table can be used to display both.

Script Parameter: GRIDCDI.REVERSED [0: unchecked (default), 1: checked]

Select the Pixel view option for display purposes. By default, the grid is first interpolated to a smooth image at the screen resolution. If you prefer to honour the grid resolution, the image will appear pixelated, and the colour will change at the actual grid interval rather than the screen resolution. Formerly, this functionality was found under the image filters as " No smoothing (GRD)". Check this box to forgo the smoothing.

Script Parameter: GRIDCDI.PIXEL [0: unchecked (default), 1: checked]

Specify a single vertical exaggeration for displaying all the output section grids.

Press the calculator button (), located next to this field, to have the vertical exaggeration calculated. (It will be based on the longest section grid; see the Application Notes below for further details.)

Script Parameter: GRIDCDI.VERTICAL_EXAGGERATION

Grid

Select a display method from the drop-down list. The selection includes three gridding methods: Minimum Curvature Gridding, Inverse Distance Weighting, and Direct Gridding.

In addition, the pixel plot produces a grid-like output but draws a rectangle around each data point, and so, unlike gridding, preserves both the original location and data values.

Script Parameter: GRIDCDI.DISPLAY_METHOD

Depending on the Display method selected, it is possible to set:

• both the vertical and horizontal cell size for Inverse Distance Weighted Gridding and Direct Gridding.

• just the horizontal cell size: Minimum Curvature Gridding uses square grid cells.

• neither: pixel plot cell sizes vary in both dimensions depending on the data separations.

Script Parameter: GRIDCDI.CELLSIZE_X

Script Parameter: GRIDCDI.CELLSIZE_Z

Select the Advanced Gridding Options button to modify the parameters of the selected gridding method. For more information on the contextual parameters, click the Help button on the Advanced Gridding Options dialog.