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The Envisage tools serve as the beginnings of a Geographic Information Systems (GIS). Depending on your definition of and requirements from a GIS system, Envisage may provide you with the necessary options. This discussion focuses on the Analyse - Attribute Data menu options.

3.3.1 Analyse Menu: Attribute Data

If you have a link already set up, you can simply use the Inquire option. If only one link has been set up, it is automatically used. With more than one link, you will be asked to choose which you would like to use. The options for establishing a link using the Create option are: 1) linking to a text file, 2) linking to a database, 3) linking to a single command, or 4) linking to a macro running one or more commands. Linking to a database or macro are more complex processes.

Linking to a Database

In our example, we have a "Services and Supplies Database," which is a form of samples database; it is named demo.srv. We also have named objects in our layers. Now we can set up index keys in the demo.srv database which match the names of objects. When setting up a database link by selecting ISIS_DB from the confirm box, fill in the panel accordingly:

Linking to a Macro

Of the four types of links, macros are the most powerful. In our example, we have an image (PEXEL file) to which we wish to link. This

may represent a photograph of an electrical substation, for example. Simply select MACRO from the Link type selection panel, enter the name and description of the link:

Click on ADD, to see the following panel:

Select PICTURE_ABS, then enter the name and type of file in the next panel. The file must be in the current working directory. Jpeg and Gif file types are not supported so you must convert to either RGB or PEXEL file type using the File - Convert menu if your picture files are in another format.

Note that despite nominating the file type, you are obliged to type in the full file name including the file extension in the name field.

If you choose to use a connection line between the selected object and the image to be posted, you might get:

3.3.2 Analyse Menu: External Data

In VULCAN core photos can be associated with drill hole traces. The functionality can be set up to allow you to click on a drill hole and view the core photos associated with the metre on which you clicked. Use the Analyse - External Data menu to link the core photos with the drill hole traces. To enable the viewing of core photos you must first set up the External Command Query. This is done with Analyse - External Data - Set Up (Figure 1).

Figure 2: External Command Query panel

Once selected, the External Command Query panel is produced (Figure 3-2). In the Data area containing

files field you can enter either a path or a variable. We have set up a variable that looks at a path on the

network as there will be a substantial number of photos and having a variable set will allow you to swap quickly between areas if required. For this functionality to work, ensure you have the environment variable set CORE_PHOTOS for example, with the value of O:\Exploration\Core_photos\). The naming of the target photographs is important: the files must be names using a syntax that shows the depth range.

Click on Analyse - External Data - Set Up (Figure 1).

In Data area containing files, type CORE_PHOTOS (Figure 2). For File extension, type jpg (Figure 2).

Command to execute is V:\resources\xnview.exe $ & (Figure 2). (Any image viewer can be specified e.g. Paint Shop Pro but you must type in the full path to the executable for that program). Name type is <object name>_<z range>.<extension> (Figure 2). The format must be adhered to:

the object name can be the drill hole identifier (uppercase) and the z range is separated by an underscore character, for example, NBD051_221.100_227.100 would access a drill hole called NBD051 between the z-level of 221.1 - 227.1.

In the Z value part of the panel click the radio button for Convert to distance along object from

point 1 (Figure 2).

Click OK.

Once the External Command Query has been set up, you should not need to go through this procedure again as it will be saved automatically.

To display the core photos for a drill hole, you must have the drill hole loaded on screen. To load drill holes, open a database using the Geology - Drilling - Open Database option (Figure 3). For example, the datasheet

name for drill hole data is GEO and the optional database identifier is ODBC (Figure 4). ♦ Click on Geology - Drilling - Open Database (Figure 3).

♦ Pick the datasheet name GEO (Figure 4).

♦ Pick the Optional database identifier ODBC (Figure 4). ♦ Tick on Smooth drill hole traces (Figure 4).

♦ Interpolated points per interval is 10 (Figure 4). ♦ Click OK.

Figure 4: Opening a drill hole database

Once the database is open you can load the required holes. Use the Geology - Drilling - Load by name option to load the drill holes. To load all holes you can use a wild card such as “*”, to load a group of holes

♦ To load all drill holes, use “*” which is a wild card then click OK (Figure 5)

Once you have loaded your drill holes you can perform an inquiry on them to view the core photos. ♦ Use Analyse - External Data - Inquire option (Figure 6).

♦ Click on the drill hole trace for the area you wish to see the core photos.

The installed imaging software (Microsoft Paint, PhotoEditor, Paint Shop Pro, ImageView, or in this case, XnView), will open in a separate window and display the image of the drill core for the specified interval (Figure 7).

Figure 5: Loading drill holes by name panel