Geosoft - Exploring With Data

Viewing Data in Profile

Did you know that you can view a profile of your data in the Database in Geosoft's Viewer?

To get started, open your Geosoft Database (.GDB) in the Viewer. If you don't have a Geosoft Database, you can start with a simple comma-delimited text file. Add a row for columns names if you like (it should start with a / on line 1 of the file) and then save it with a .XYZ extension. Then you can easily import it to a Geosoft Database.

Right click on the channel or column to see the options for showing a profile.

The spreadsheet window and the profile are linked so if you click on one, the other will jump to match your selection.

You can also show the values as symbols. This is useful if you change the X axis to use another column.

Here it is using "Depth" to order "Magnitude". Right click on the Profile to see the X Axis options.

You can show multiple channels profiles together (in the same window or drag open another profile window).

Right click on the profile windows to see more options. 

Geosoft Software Update 9.3.3

Geosoft 9.3.3, including updates for Oasis montaj 9.3.3, Target 9.3.3, and Target for ArcGIS 9.3.3, is now available. You can view the release notes and download the executable from My Geosoft, or go to Help > Check for Updates, and click Update to begin the install when a software update is available.

See what’s in 9.3.3.

What samples are inside this surface?

I used to hear the question: How can I tell what lithology this sample is in? When your geology and geochemistry are logged at different intervals, or as points (for structures), finding out what lithology your sample occurs in can be tricky.  We covered how to do this with a simple database lookup in What interval is this structure in?

Lately the question sounds more like this: What solid is this sample in?  where you have a closed 3D solid surface or model and a drillhole database of points or intervals (both have XYZ locations - your interval is most likely represented by the midpoint).  Presently, the 3D Math tool does not include database channels as variables, but in the meantime you can still easily fill this in as a new channel in your downhole data in just a few steps.

1. Create new channel in your sample database and fill it. I named my channel "Temp" and filled it with 1's for all selected holes.

 

2. Create a new voxel where each cell in the voxel represents a sample.

I used Voxel > New Voxel > Direct Gridding with a cell size that roughly matches my sample interval. In this image, the wireframe surface (IBF) is shown in green, the drillhole traces are white, and the blue is the new temp voxel created from the temp channel in step 1.

3. Use the Voxel Math tool to create a second new voxel that fills the closed surface you are interested in. The temp voxel created in Step 2 is the "MasterVoxel".

The new in-IBF-surface voxel is displayed in the 3D View.

In this image, I've adjusted the colour of the new voxel to orange and turned off the other layers.

4. Sample the new voxel back to the drillhole database with Voxel > Utilities > Sample a voxel... 

This will fill a new In_IBF channel with 1's where the sample is inside the voxel and solid. 

If you like, you can verify your result by plotting 3D Symbols of your new channel.

 

In this image, the sample locations that are inside the wireframe are plotted as red symbols.

Need a few more? To create a simple channel with the code for the intersecting solids, use a simple conditional statement like this:

In_Code = in_IBF==1?"IBF":(in_OVB==1?"OVB:(in_SST==1?"SST":"")) 

Finally, you can automate some of these repetitive tasks using Scripting. 

Have questions?  Join the discussion.

Tip: Recolour grids to zoomed area

I may have mentioned this one before, but someone just described it as a "magic button" so perhaps it is worth repeating!

You can use the Auto Recolour Grid button to stretch the colour ramp over the zoomed in area.

With one click, you can go from this:

to this:

Geosoft Software Update 9.3.2

Geosoft 9.3.2, including updates for Oasis montaj 9.3.2, Target 9.3.2, and Target for ArcGIS 9.3.2, is now available. You can view the release notes and download the executable from My Geosoft, or go to Help > Check for Updates, and click Update to begin the install when a software update is available.

See what’s in 9.3.2.

Geosoft Software Update 9.3

What's New in Geosoft 9.3?

In addition to being able to create animated videos from snapshots, there are voxel display options for smoothing, upgraded 3D rendering, classified colour options for 3D drillholes, colour legends in 3D, and lots more! 

See all the new features in each product and update your software:

• Oasis montaj 9.3
• Target 9.3
• Target for ArcGIS 9.3

 Have questions or comments? Join us in the Geonet forum.

3D Animations to Video in 9.3

My favourite new feature in the upcoming release of Geosoft 9.3 lets you turn 3D snapshots into an animated video.

3D snapshots include the viewing angle and distance, which groups are visible, along with transparency, clipping, and other visual attributes. Opening a snapshot restores the view to the same state as when you saved it. You can use snapshots to share detailed 3D views​ or to bookmark perspectives that you would like to return to later.

After creating a few snapshots, use the animation tool to combine them into a video. Smooth panning and fade effects are used to transition between snapshots and ensure that your final animation is a clean, seamless viewing experience. Save the video as a WMV or MP4 and share or publish the file.

3D videos are a great way for you to tell a story about your project.

Conditional Statements in Math Expressions

Did you know...

You can write Conditional statements (also known as logical, ternary, true/false, or if then else statements) in the Math Expression Builder for database channels, grids, and voxels.

The expression format is 

    New = ( ) ? ( ) : ( )

where the "if" statement is before the question mark, the "then" statement is after the question mark, and the "else" statement is after the colon.

You can also nest these statements.  For example, this statement fills in new values for a channel called NewZ when Depth is less than 0 and when Altm is greater than 1000.

    NewZ = ((Depth <0 ? 0 : Altm > 1000) ? DUMMY : Z)

 

You'll find the shortcut in the Frequent tab under Operators and Functions in the Math Expression Builder for each document type:

1. Databases (Database Tools > Channel Math...)
2. Grid (Grids and Images > Grid Math...)
3. Voxels (Voxel > Voxel Math...)

You can also use the Common Tasks to fill in an example True/False statement

Here are some more resources to check out:

• Math Expressions video
• How to write a true/false math expression statement
• or Search for "math expression" to find many other related resources

Geosoft Software Update 9.2

Geosoft 9.2, including updates for Oasis montaj 9.2, Target 9.2, and Target for ArcGIS 9.2, is now available. 

You can view the release notes and download the executable from My Geosoft, or go to Help > Check for Updates, and click Update to begin the install when a software update is available

 

One of my favourite additions in 9.2 is map navigation mode to pan on all maps. When this mode is activated in a map, the viewed area will automatically pan to keep the cursor in view. This is useful for scrolling along a line of data. Or if you select a target location on a map or from a database, then the map view will center on the new cursor location in all the other maps while maintaining the same zoom level.

Event: PDAC 2017

Visit us during the PDAC at Booth 931. Geosoft is hosting presentations illustrated with recent examples from the industry and demonstrations on the latest Geosoft software solutions for exploration and the earth sciences.  

Check the schedule of events starting on Sunday March 5th, and register to attend or receive a video at PDAC 2017.