Export ASCII - Block Selection

Use this section to limit the selection of blocks to export from the block model.

By default, all blocks from the model will be selected for export. However, it is possible to apply a number of selection criteria to limit the blocks which will be exported to the report.

Block Selection

Select the method by which blocks should be selected.

Use block centroids/Proportional cell evaluation

Select Use block centroids to include any blocks whose centroids are within the region, or select Proportional cell evaluation to include blocks that touch the region and evaluate reserves according to the proportion of the block's volume that lies within the region.

Mask by variable

Select the Mask by variable check box if you want to restrict the blocks by a block model variable. You will need to select the variable and value to mask by from the Variable and Value drop-down lists.

Example: To restrict blocks to those where Material equals Ore, select Material as the variable and Ore as the value. The block model variable may be alpha or numeric.

Use test condition

Select the Use test condition check box if you want to use a further constraint upon a numeric block model variable and enter the condition in the Condition field. The maximum size of the condition is 132 alphanumeric characters. (See Vulcan Core Appendix B topic for a full list of available operators and functions.)

To select only blocks that have an iron value greater than 10.0, you would select the Use condition check box and enter Fe GT 10.0 in the Conditions field.

Use bounding triangulation

Select the Use bounding triangulation check box if you want to restrict the blocks by a triangulation. You will be required to specify the bounding triangulation. Select the triangulation to use from the Triangulation drop-down list, or click Browse to select a triangulation from a location other than your working directory.

Note: This option is not applicable to open or 2D triangulations.

Use bounding surface

Select the Use bounding surface check box if you want to restrict the blocks by bounding surfaces. If you select this option, you must select the Upper triangulation and Lower triangulation from the drop-down list, or click Browse to select a triangulation from a location other than your working directory.

Use bounding box

Select the Use bounding box check box if you want to restrict the blocks by a box. If you select this option, you must enter the minimum and maximum coordinates for X, Y, and Z in the Block model coordinates (X. Y, Z CENTRE) should be used section.

Reverse selection

Select the Reverse selection check box if you want to exclude the selected blocks within the slice. If this check box is not selected, the entire block is included within the slice by default.