Drillhole Import – From-To – XLS/MS Access Database/ODBC

From-To Data is data acquired over specified depth intervals down the hole. Two examples of "From - To" data are: geochemical assay data and geological rock codes.

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

From-To Tab options

Channel Type
From-To View	Specify the From-To view to import.
(Rename)	Click this button to rename the selected view.
(Add)	If you have more than one From-To view to import, click this button to add another view/sub-tab.
(Remove)	Click this button to delete the selected view/sub-tab.
FromTo_1	By default, the first from-to view to import will be named FromTo_1. Subsequent from-to sub tabs that are added will be named FromTo_2, FromTo_3, etc… These can be renamed using the Rename button. If the import data contains an "assay" table, an automatic matching with the destination table name will be made and the first from-to view to import will be named "Assay."
Database Fields	The Drillhole Import wizard enables you to easily import data from any table within a database. If you had multiple tables you would be able to select a specific table from the Database Table drop-down list. The Database Fields window displays the fields in the selected database that are available for import. Select (highlight) each field to be imported, then specify the channel type and parameters. The channel type has been automatically determined for each of the available database fields. It is always good practice to review your data to ensure correct field selection and channel type mapping.
[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.
Depth From	Select the Depth From radio button if you want the selected (highlighted) Database Field to be imported as depth from data. This is a required channel.
Depth To	Select the Depth To radio button if you want the selected (highlighted) Database Field to be imported as depth to data. This is a required channel.
Assay	Select the Assay radio button if you want the selected (highlighted) Database Field to be imported as assay data.
Sample	Select the Sample radio button if you want the selected (highlighted) Database Field to be imported as sample data.
Standard	Select the Standard radio button if you want the selected (highlighted) Database Field to be imported as standard data.
Duplicate	Select the Duplicate radio button if you want the selected (highlighted) Database Field to be imported as duplicate 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, the message “Ready to import From - To View data” will be displayed at the bottom of the tab. The OK button 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.