Define Isopach Maps Auto-Run
Function
The Define Strata Isopach Auto-Run is for building the macro auto-run
file
containing the isopachs to create. There is still the option to run the
auto-run from here if desired. If there are not any drillholes, for
example,
you are coming from grids, just hit Enter when prompted to select
drillholes.
The first dialog shows the defined isopachs that will be created. There
are buttons to Edit, Add and Remove the row. The Sort will sort them in
order. Up and Down will move them up or down the list. The On or Off
buttons turn them on or off for processing. The Make Isopachs button
starts the process and creates the isopach maps. Load and
Save/SaveAs will load or create the CTR file. The two entry dialog
boxes are slightly different, depending on drillholes or grids. Both
are shown below.
Following is a description of all the items on the dialog for the
Auto-Run Isopach.
- Processing on: This needs to
be selected to build the isopach. It controls the Process column on the
first screen.
- Strata Name: This will
display the strata name if isopaching from drillholes. If isopaching a
grid, then this will be blank.
- Value
to Process: This is the attribute or item to isopach. It can be
an elevation, thickness or any quality attribute. It will be grayed out
if isopaching a grid file.
- Contour
Layer: Enter the AutoCAD layer for the contours.
- Color:
Choose a color for the contour layer.
- Contour
Interval: Enter a contour interval . This is for the
intermediate contours. Index contours are set below.
- Smooth
Contours: This toggle will determine if the contours are
smoothed. The slide bar controls the smoothing from Low to High.
- Smoothing
Sub-Division Levels: The smoothing subdivision option will
internally subdivide the grid cells with a quadratic smoothing
algorithm to help create smoother contours.
- Reduce
Vertices: This option removes vertices from the contour lines,
as long as the contour line does not move more than the Offset Distance
from the original location.
- Drawing
File: There is the option to output each isopach map to its own
AutoCAD drawing file. To do this, just select the Choose Drawing File
button and enter a drawing name. This name is displayed above the
button. If this is not selected, then the isopachs are drawn in the
current drawing.
- Grid
File: The Choose Grid file button is active only if the Modeling
Method is set to Grid File. The grid to isopach is displayed above the
button.
- Modeling
Method: There is the option to model the drillholes by
Triangulation, Inverse Distance to any power, Kriging, Polynomial and
Least Squares. Using a premade grid file is also set here if the
drillholes are not used.
- Draw
Index Contours: Turn this option on to generate the index
contours.
- Set
Index Options: This brings up the Index contour options screen
to set the interval, width, layer and color shown below.
- Label Contours: This option will label the contours.
- Set Label Options: This button will
bring up the Contour Label Options screen shown below.
- Ignore Zero Values: This option will ignore any zero values
for contouring.
- Use
Triangulation Subdivision: When modeling with Triangulation or
Polynomial, this will subdivide the triangles into at least 3 smaller
triangles for smoother contours.
- Use
Global Trend Extrapolation: When modeling with Triangulation or
Polynomial, this will extrapolate to the edge of the grid limits based
on the overall global trend.
- Set
Kriging Parameters: When modeling the drillholes with Kriging,
This button brings up the Kriging Spatial Continuity Model settings
screen shown below.
- Inverse
Distance Power: When modeling the drillholes with Inverse
Distance, this is the power that the distance is raised to. It can be
any power, including decimals.
- Elliptical
Inverse Distance: If the ore body is long and narrow, sometimes
an elliptical inverse distance modeling method is preferred. This
option will allow for two different powers to create an ellipse.
- Anisotropic
Azimuth/Factor: When using the Elliptical method, this is the
azimuth for the second factor, and the second factor power.
Prompts
Select drillholes, channel samples and
strata polylines or ENTER for None. Select Enter if isopaching
only grid files.
Select objects: all
61 found
Select objects:
Reading drillhole 194
Finding splits ...
Finding pinch out ...
Calculating seam stacking ...
Select the Inclusion perimeter polylines or ENTER for none.
Select the Exclusion perimeter polylines or ENTER for none.
Pulldown Menu Location: StrataCalc in Advanced Mining
Keyboard command: chiso2
Prerequisite: Drillholes or
grid files
File Name: \lsp\makegrid.arx