Collar Tab – Drillhole Import – XLS/MS Access Database/ODBC

Use this tab to specify the import parameters for the collar data to be imported into a Drillhole database.

Collar Tab options

Channel Type
Collar View	Specify the collar view to import.
Database Fields	The database fields that are available for import. Select (highlight) a field to specify the Channel Type and Parameters.
Filter Conditions	Click this button to open the Filter Conditions dialog.
Not imported	Select the Not imported radio button if you do not want the selected (highlighted) Database Field to be imported.
Data	Select the Data radio button if you want the selected (highlighted) Database Field to be imported as Data.
Hole ID	Select the Hole ID radio button if you want the selected (highlighted) Database Field to be imported as Hole IDs. This is a required channel.
Easting	Select the Easting radio button if you want the selected (highlighted) Database Field to be imported as eastings. This is a required channel.
Northing	Select the Northing radio button if you want the selected (highlighted) Database Field to be imported as northings. This is a required channel.
Elevation	Select the Elevation radio button if you want the selected (highlighted) Database Field to be imported as elevation. This is a required channel.
Hole Top	Select the Hole Top radio button if you want the selected (highlighted) Database Field to be imported as hole top data.
Total Depth (EOH)	Select the Total Depth (EOH) radio button if you want the selected (highlighted) Database Field to be imported as total depth data. This is a required channel.
Collar Dip	Select the Collar Dip radio button if you want the selected (highlighted) Database Field to be imported as collar dip data.
Collar Azimuth	Select the Collar Azimuth radio button if you want the selected (highlighted) Database Field to be imported as collar azimuth data.
Parameters
Field name	Specify the "Field name". This field is read-only for required channel types.
Data type	Specify the "Data type". This field is read-only for required channel types.
Data format	Specify the "Data format". This field is read-only for required channel types.
Dummy	Specify the alpha and/or numeric characters to be used as the dummy. The default is (*).
OK	Click the OK button to import the data into drillhole databases.

Application Notes

Once all the required channels are specified, “Ready to import Collar data” will display at the bottom of the tab. OK can only be clicked once the required channels have been mapped to a database field.

Excel Database (XLS) Import

The Microsoft ADO software that we use to read and import XLS files only scans the first 20 rows or so of the data. It then makes a decision about the type of data based on what it sees (it will generally ignore the first row because it is used for titles, etc.)

If there is no data in the first 20 rows of a column, it assumes all values are type "string". This would be fine, but any actual values stored numerically are no longer picked up by the ADO software, and are reported to Oasis montaj as being "VT_NULL" type, that is, blank!

Therefore, to ensure that a numerical column in Excel is imported, there MUST be a value in the first 20 rows or so.

The numeric type entered in the wizard (e.g. string/float) controls only the type of the channel created in the database; it has no effect on whether the data will be recognized or picked up during the import.

We have tried to get around this Microsoft limitation, but with no success.

The workaround is either to re-order the original data so that there are data values in the first 20 rows, or to export to another format (example CSV) and import it that way.