Extract Section(s) from Voxel
Use the Section Tools > Extract Section(s) from Voxel menu option (geogxnet.dll(Geosoft.GX.VoxUtils.VoxelSection;Run)*), to extract vertical slices of a voxel model as grids.
The option can also be found on the Add to 3D > Grids menu in the 3D Viewer.
Extract Section(s) from Voxel dialog options
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Voxel file
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Browse to the voxel file from which the grid or grids are to be extracted.
Script Parameter: VOXLINESECTIONGRID.VOXEL
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Output grid file
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Select a name for the output grid or grids. If one of the options which process multiple lines is selected, then the input name is modified to include the individual database line name. For instance, if the input grid name is "sect.grd", then the actual grid created for line L0 would be "sect_L0.grd".
Script Parameter: VOXLINESECTIONGRID.GRID
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Section selection
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There are three database-related options: Displayed line, Selected lines and All lines. There is one map-related option: Interactive – from map. The latter allows you to interactively select a profile line from a plan map.
Only the start and end points of the line are used to determine the location of the slice. If the original line path from the database line or from the line digitised on the map is not a straight line, the start and end points of the line will be used.
Script Parameter: VOXLINESECTIONGRID.LINES ("A": All, "D" Displayed, "S": Selected, "I": Interactive – from map.)
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Grid cell size
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Select the size of the cells in the output grid(s). If left blank, cell size values will be determined based on the voxel cell sizes.
Script Parameter: VOXLINESECTIONGRID.CELLSIZE
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Interpolation method
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Select either Linear (to interpolate a value from the voxel values closest to the grid cell centre locations) or Nearest, which finds the closest location in the voxel model and uses it.
Script Parameter: VOXLINESECTIONGRID.INTERP ( "L": Linear, "N": Nearest.)
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Colour method
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Select a colour method. This selection is ignored if a colour table is defined and it already has a colour transform, except if “As last displayed” is entered. In that case, if the same grid has previously been created, its previous colour transform is used, and takes precedence.
Options include:
Default: Use an equal-area histogram transform if no transform is present.
Histogram equalization: Data is binned and approximately the same number of items are assigned to each colour.
Normal distribution: A normal distribution is applied, based on the standard deviation and mean calculated from the voxel statistics.
Linear: The minimum and maximum voxel values define the endpoints.
Log-linear: A logarithmic distribution, with adjustments for negative values.
Script Parameter: GRIDIMG3D.METHOD (0: Default; 1: Linear, 2: Normal, 3: Histogram equalization, 5: Log-linear, 6: As last displayed)
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Colours
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Select the colour scheme for rendering the image of the selected grid. If you mouse over the colour scheme entry, a tooltip will display the name of the colour table in its folder. To modify the selection, click on the colour entry and then navigate through the scheme categories. |
Application Notes
*The GX tool will search in the "...\Geosoft\Desktop Applications \gx" folder. The GX.Net tools, however, are embedded in the geogxnet.dll located in the "...\Geosoft\Desktop Applications \bin" folder. If running this GX interactively, bypassing the menu, first change the folder to point to the "bin" folder, then supply the GX.Net tool in the specified format.
Extract Section Grids from a Voxel Model
This GX is designed to use either a current map, or a current database, depending on the selection for "Lines to extract from".
For the database lines options, the first and last valid locations are used to define a profile through the voxel model. For the interactive map option, the user interactively selects a profile, using the current map. Be sure that the current map is a plan map before you run this method.
The output grids are automatically trimmed to eliminate locations beyond the edges of the voxel model, and are given an orientation warp so they may be readily plotted in a 3D view.
Script Mode Parameters
In script mode, if the "I" option is selected for a map-based section, the end points are entered using the following script parameters:
VOXLINESECTIONGRID.X0
VOXLINESECTIONGRID.Y0
VOXLINESECTIONGRID.X1
VOXLINESECTIONGRID.Y1
