ISOMET Process

• ISOMET Process
  • Process Overview
    • • Process Examples
  • Input Files
  • Output Files
  • Fields
  • Parameters
  • Example
  • Error and Warning Messages

To access this process:

• Enter "ISOMET" into the Command Line and press <ENTER>.

• Display the Find Command screen, locate ISOMET and click Run.

See this process in the Command Table.

Process Overview

Generates a plot file of an isometric view of a wireframe surface from a block model, from a user-defined viewpoint, described by rotation and elevation angles.

Four different types of surface may be viewed:

1. Grade surface of a defined field at a chosen level.

2. Top of seam structure.

3. Bottom of seam structure.

4. Seam isopach (top minus bottom of seam).

The required surface is chosen by specifying the appropriate parameter(s) from the set @PLANE (defining the plane of the surface as 'XY', 'XZ', or 'YZ'); @POSITION (defining the position within the plane at which a grade surface is required); @TOP (defining the top of a seam); and @BOTTOM (defining the bottom of a seam). The choices are:-

1. For conventional grade surfaces, choose @PLANE='XY', 'XZ' or 'YZ', and then the position in this plane. For the XY plane, @POSITION is the required elevation (ZC value). For the XZ plane, @POSITION is the required Y co-ordinate (YC value). For the YZ plane, @POSITION is the required X co-ordinate (XC value). Neither @TOP nor @BOTTOM are set. The field *FIELD defines the field whose values will define the surface at the given position.

2. For top of seam surfaces, @PLANE='XY' (default). @TOP is set to the value of field *FIELD defining the required seam. Neither @BOTTOM nor @POSITION are set.

3. For bottom of seam surfaces, @PLANE='XY' (default). @BOTTOM is set to the value of field *FIELD defining the required seam. Neither @TOP nor @POSITION are set.

4. For seam isopach surfaces, @PLANE='XY' (default). @TOP and @BOTTOM are set to the value of field *FIELD defining the required seam. @POSITION is not set.

Scaling in this program is entirely automatic, thus X and Y minima, maxima, and scales need not be defined even in the prototype. If they are defined, the ISOMET process will merely substitute its own internally generated parameters.

Progress messages are displayed as the model is read and as each column of the isometric view is completed.

Process Examples

@POSITION=-45,*FIELD(Fe)

The surface will pick all those cells or sub-cells which cross the XY plane at -45, and will show Fe grades.

@TOP=2,*FIELD(SEAMID)

The surface will be generated from the top of the seam identified by field SEAMID=2.

@BOTTOM=2,*FIELD(SEAMID)

The surface will be generated from the base of the seam identified by field SEAMID=2.

@TOP=2,@BOTTOM=2,*FIELD(SEAMID)

An isopach surface of seam SEAMID=2.

The smoothness of the surface may be controlled by parameter @GRIDINT. This defines the grid interval at which points will be sampled or generated for the surface mesh. It should be set to the grid size (in user data units) or less, preferably a sub-multiple of the grid size. You are recommended to start with @GRIDINT equal to half of the grid spacing (the smaller of X or Y, if different). Note, however, that the appearance of the surface will once again get worse if the interval is too small, because of the linear interpolation used between points.

Input Files

Output Files

Fields

Parameters

Example

!ISOMET   &IN(FEMODEL), &PLOT(ISOMPLOT), *FIELD(Fe),
@POSITION=-45, @VMIN=30, @VMAX=80, @VERTEXAG=10, 
@ROTATE=50, 
         @ELEVATE=60, @GRIDINT=10

Error and Warning Messages