Drilling - Client specific
Calculate Drillhole Coordinates
The Drilling option to read a TDS. asc file and determine if there is one or more survey shots taken on the drill steel. This option also creates an ASCII file of the collar coordinates and orientation of the drillholes.
The option looks for specific descriptor codes, DCF, DCB and DCC in the.asc file. The DCF and DCB codes should always occur in pairs, beginning with the DCF code. DCF (drill collar, foresight) and DCB (drill collar, backsight) describe a vector whose bearing and inclination are calculated and then reported in the output ASCII file. Typically, the DCF code will be followed by a number, For example, 2 that indicates that the DCF survey shot was taken 2 feet/metres from where the hole is actually collared. This distance, along with the calculated bearing and inclination, is used to determine the easting, northing and elevation of the hole at the face, which is also reported in the output ASCII file.
The DCC (drill collar, at collar) descriptor code describes a survey shot taken right at the collar of the hole. In the output ASCII file, only the easting, northing and elevation will be reported. Information for the bearing and inclination cannot be calculated (the ASCII.A. will be displayed in the ASCII file).
Figure 1 : Cross Section Schematic
Instructions
- Select Survey menu
- Select TDS submenu
- Select Drilling option
The following panel displays.
Drilling panel
Input file
Enter, or select from the drop-down list, the name of the file (including the .asc file extension) that you want to use as input.
Output file
Enter the name of the resulting file (file extension is optional).
Include header line
Select this check box to place a column heading above each column in the resulting file.
CSV format
Select this check box if you want the output to be CSV data (separated by commas).
Select OK.
The file is then generated and you will be asked whether you want to view the file. If you choose to view the file, then it displays in the Report Window.
