How To: Display two or more different hole/collar types on a drillhole map
Symptom/Problem:
User would like to use two or more different symbols representing different collar/hole types on a plan or section map. For example, the user would like to differentiate existing drillholes from proposed drillholes. All of the data exists in one collar database.
Environment:
Oasis montaj (licensed to run the Drillhole extension); Target, Target for ArcGIS.
Resolution:
This example will outline the steps necessary for a user who wishes to symbolize a map showing existing drillholes and proposed drillholes on the same section map. You can use the workflow below to model different types of scenarios.
1. Create a "status" channel in the collar database: in an empty channel header, type "status" (or whatever you would like to call the new channel) and press enter. This creates a new empty channel. You can also right-click on an empty channel header cell and choose 'New'.
2. Specify the Data Type of the new channel as "string" in the data type dropdown menu; ensure that you change the size of the channel - the default value of 12 may greatly increase the size of the database - make the channel just wide enough to use a code that will differentiate existing drillholes from proposed ones. You can also choose to create a numeric channel, and populate it with numeric values that represent the different hole types.
3. Populate the status channel with the codes that you wish to use to differentiate the existing drillholes from the proposed holes; you can type in the individual values in each cell, or you can select a series of cells and then type in a value that will populate each of the selected cells.
4. Go to DH-Plot > Section, to plot the section (or DH-Plot > Plan to plot a plan map). On the Collars tab, there are three ways to plot the collars. Choose the last option, "String Classified Symbols". If you've populated your new channel with numeric values, choose "Zone Coloured Symbols".
5. For String Classified Symbols, from the "Class Channel" dropdown, choose the "status" field that you recently created in your Collar database. It is the 'Zone Channel" for zone coloured symbols.
6. Click the [Define] button. You are then asked to select a collar symbol classification file name. In the 'File Name' box, enter a new file name, e.g. stringclassified.csv. Click Open.
7. The "Edit Symbol Codes" dialog will appear. Click [Populate from Channel] and choose the "status" channel from the Select Data Source dropdown. Click Yes to import them, and then you will see the two values from your "status" channel added to the list of symbols.
8. You can click on the symbols in the right-most column to bring up the Symbol Attributes. From here, you can choose more appropriate symbols (define different symbols, fills, fonts, sizes, rotation angle, and colours).
9. Click [OK] to go back into the section/plan map parameters. When finished, click [OK] to create your section/plan map.
Note: The collar tab also exists in Stacked Sections and Fence Diagrams, and you can apply the above methods for these types of diagrams as well.
