Generate Z Values

On the Grid / DTM tab, in the DTM Tools group: Click Generate Z Values to calculate the Z values for any points within the area of an existing DTM. This provides a way of determining elevations for known collar locations.

The specified wireframe must exist and must cover the X and Y range of the data points in the Input file. Points outside the DTM range will not have Z values calculated.

DTM

In the DTM Z Value form, double-click to select the Name and Type of the Input wireframe.

Side of DTM

If the wireframe is a solid rather than a surface, the Side of DTM prompt allows you to specify whether TOP or BOTTOM values, or THICKNESS are to be used when generating Z values.

The THICKNESS option will write the difference between TOP and BOTTOM values to the Z field.

Input file

Select an Input file type. Enter (or double-click/F3 to select) the name of the file and apply a filter if necessary.

X, Y and Z fields

Specify the names of the fields in which Easting, Northing, and (optionally) Z coordinates are stored in the file.

Note: The tool will accept any rotated block model file as an input, however the result will not be written into a rotated Z coordinate field. The specification of an Output Z coordinate field is therefore mandatory.

Output

Z Field

Double-click to select the name of the field to which the generated Z values will be written (in the Input file). The field will be created if it does not exist. For a rotated block model, the name of the Output Z field cannot be the same as the name of the Input Z field.

Wireframe name field

Optionally, double-click to select the name of the field to which the name of the wireframe will be written.

Clear existing Z values

Select the Clear existing Z values option to ensure that new Z values are written to all records in the Output file.

Overwrite existing Z values

Select the Overwrite existing Z values option in order to replace existing Z values in the output file. If the Overwrite check box is unchecked then the function will only overwrite values where the existing Z value is blank.

Run

Finally, click the Run button to run the function.