Bi-Directional Line Gridding
Use the BIGRID GX to create a new grid file using the Bi-directional gridding method.
Bi-Directional Line Gridding dialog options
Channel to grid |
Select the database channel to grid. Script Parameter: BIGRID.CHAN |
Mask channel |
Select a channel from the drop-down list to act as a mask (or filter) channel. String channels and channels with array size greater than 1 are omitted from the list. The data values in the channel to grid with corresponding dummy (*) values in the mask channel will not be used in the gridding process. This field is optional. Script Parameter: BIGRID.MASK_CHANNEL |
Output grid |
The output grid will be placed in this file. The type of file can be controlled using the browse dialog, which is accessible from the [...] button. Script Parameter: BIGRID.GRID |
Grid cell size |
Specify the grid cell size. The cell size is the distance between grid points in the X and Y directions. In most situations, the cell size can be selected as 1/4 to 1/8 of the line separation or the minimum station interval, whichever is greater. By default, BIGRID will choose a cell size based upon these criteria, although we do recommend that you choose the cell size directly. Script Parameter: BIGRID.CS |
Go to the Advanced Gridding Options dialog. |
Application Notes
The Bi-Directional Line Gridding option generates a grid file using a two step process:
- Each line is interpolated along the original survey line to yield data values at the intersection of each required grid line with the observed value.
- The intersected points from each line are then interpolated in the across-line direction to produce a value at each required grid point.
The bigrid.log file is produced with each run and contains information about the bigrid process, including lines skipped due to backtracks or clipping.
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