How do I display a 3D vector file from another application into a Drillhole Section?

kbadmin — Thu, 21 May 2020 23:37:55 GMT

Solution

You can do this, by selecting all sections you wish to display it on in the section manager (select multiple by CTRL>Left Click).

Then go to the Section Manager>Analytical Tools>Display 3D Model on Section

This allows the easy display of multiple .DXF and Discover 3D .FDB vector models onto the selected cross-sections as attributed polygons and polylines, each in their own TAB file layer. These input models can be polyhedron volumes (e.g. mineralisation isosurface halos or proposed open cut wireframes) or surfaces (such as fault planes or unconformity wireframes/TINS) modelled in either Discover 3D or a 3rd party application.

The tool will display the intesection of the vectors with with 2D section plane.

NOTE It will not project or include all data in the envelope, it will only show data that intersects the section plane. If you wish to see all data within a section envelope, you can do this dynamically with the Discover3D Cursor Plane.

For instance, this functionality allows you to take your 3D models, such as :

And slice / intersect them across multiple 2D sections, with an assigned style per model, producing polygons and polylines stored and managed on a per section basis:

The Create Pierce Point Layer tool is found within the Section Manager -

This converts downhole intervals into attributed MapInfo Professional Point symbols. This significantly enhances the display and analytical options for this data on long- and cross-sections, such as:

A range of label positions for composited intervals, such as created with the Downhole Object Clip tool. Pierce points can be created at the top, mid-point, or bottom of an interval; the shallowest of deepest RL; or the location closest to or furthest from the viewer.

Use of MapInfo Pro symbols to highlight and reinforce particular intercepts (for instance, locations where boreholes have intercepted an aquifer/watertable)

Thematic mapping or geochemical data classification of pierce points (derived from clipped to 3D volume and/or composited intervals) allows for the powerful and effective display of high grade (or grams per meter) intercept values.

Surface gridding / interpolation of pierce points values (such as grade or gram/meter values) extends the advanced analysis and trend interpretation options, including resource calculations.

Some examples of the various pierce point outputs, and the display and analysis options they provide:

(1) Using a source file of downhole assays clipped to an orebody volume and then Composited by Cut-Off Grade, resulting in discrete high-grade intercepts.

Occurrence

Are you trying create and effectively display high-grade intercepts on your cross-sections and long-sections? Here are some pro-tips.

Solution

1/. Ensure you have composited your downhole assay table with the appropriate method / parameters (using Drillholes>Downhole Compositing). For instance, you may have composited the Au field with By Cut-Off Grade, using a cut-off value of 0.5g/t, and a minimum length of 5m. Also ensure that the resulting composited table is automatically added to the drillhole project by enabling the following option (the project will be re-cached during this process).

The resulting composited table may look similar in structure to this:

2/. If the cross/long-section already exists, you will need to first Regenerate the section to incorporate this new downhole data table, using the option in the Section Manager:

Datamine Discover KB - Downhole Compositing

How do I display a 3D vector file from another application into a Drillhole Section?