How do I digitize (boundaries) on my sections?

kbadmin — Fri, 09 Feb 2024 04:30:54 GMT

Solution

In Discover 2012, the method for creating and managing your digitizations and interpretations on drillhole cross sections has slightly changed.

You can now add "digitize boundary layers" - via the Section Manager, by

1. Selecting the Sections you wish to add a custom layer to
2. And then select Advanced>Add Section Layer

Note that this enhanced functionality now allows batch add/deletion - and also multiple layers with custom name suffix and fields.

To view these in 3D, select Discover3D>View Section Layer

How do I plot level or flitch plans?

Josh Knight — Thu, 12 Oct 2023 03:08:45 GMT

You can plot level or flitch plans by specifying the parameters in the Drillholes > Create > Generate Plans dialog.

1. Select the drillholes you wish to display in the level plan from the Map Window.

2. Choose Drillhole > Create > Create Generate Plans.

3. Check the ‘Clip to Elevation Range’ box under the

How do I refresh my drillhole data and regenerate a section?

kbadmin — Thu, 28 Jan 2021 23:30:01 GMT

Occurrence

Existing drillhole cross-sections and plans may need to be updated after updates and additions to a drillhole projects collar, survey and/or downhole data tables. Examples of changes to these files that may warrant section regeneration include:

- new drillholes are added to a project (including splay/daughter holes)
- new downhole data intervals (from/to) added, such as hole extensions
- new columns are added to the table for new assay elements

Solution

1/. Ensure the drillhole project's source MapInfo Pro tables have been updated with the new information, whether these need to be refreshed via a database link, appended to or replaced linked files.
If the source tables are linked tables, such as Excel, CSV or Access database, if there are no changes to the columns and table structure, simply overwrite the file with the new file (keep the name the same). For the collar table, you will also need to update the point locations using Discover>Update Coordinates
NOTE DO NOT refresh linked tables by going back to the Open table and overwriting the existing tab file. The ...

My drillhole collar positions do not match up with a DEM / DTM grid in the 3D view or drillhole cross-section.

Josh Knight — Tue, 03 Jul 2018 23:55:04 GMT

Discover plots the Drillhole collars at the value in the selected elevation field in the collar table. This value can differ from the topographic (DEM/DTM) grid you have selected in the Drillhole project setup. Discover never "auto adjusts" the value for these too match when plotted in a cross section.
Possible reasons for this are -
1. Were your collars only assigned an arbitrary height (e.g. 550m ASL) during regional exploration, prior to an accurate elevation grid surface being provided (e.g. from a geophysical survey program).
Perhaps update the collar table (as used by your Discover Drillhole Project) RL/Z value field from the appropriate accurate DEM / DTM grid surface using either the -
Legacy grids -

SURFACE>Utilities>Assign Values option
Raster Grids

RASTER>Raster Operations>Point Inspection option
2. Are your collars accurately surveyed, and you are using a coarse DTM surfaces grid, such as the SRTM Australia scale data? If so, you may need to obtain a higher quality DTM dataset, or if you have enough elevation points in your area, create a new DTM from the points using SURFACES>Interactive Gridding.

3. In the Discover 3D environment, has any kind of vertical exaggeration or offset been applied to either individual data types (through the relevant Property dialogs in the Workspace Tree) or to the 3D view ...

SQLite Error creating section in Discover 2016 or 2017

kbadmin — Mon, 13 Nov 2017 03:48:46 GMT
If an error dialog is thrown when creating Drillhole sections in Discover 2016 or 2017, this most likely is due to a date/time field in one of your Drillhole Project files.

This bug was fixed in the Mapinfo Pro 16.0.2 patch which can be downloaded from here -
http://www.pbinsight.com/support/product-downloads/item/mapInfo-pro-v16.0.2-maintenance-release

Drillhole traces are not plotting correctly

Josh Knight — Fri, 06 Oct 2017 00:56:31 GMT

Solution

Check the following common issues:

Are the drillholes going up into the sky?
Have you ticked the 'Down Dip is negative' option in the Drillholes Project Setup dialog?
Are the drillholes plotting entirely vertically?
Have you set up the correct Dip and Azimuth fields in the Drillholes>Project Setup? If you do not have a separate downhole survey table then you need to have two columns in the collar table for hole dip and azimuth. If you do have a downhole survey table then you need to make sure the correct fields are matched in the Drillholes>Project Setup.

Are your various Field names in the Project Setup dialog correctly assigned?

Check your mapping for fields in the Drillholes>Project Setup are correct (Dip to Dip, RL to Z, etc).

How do I highlight different drillhole types on a section, such as Planned holes, or RAB vs RC vs DDH?

Josh Knight — Mon, 24 Mar 2014 01:51:27 GMT
Solution

A couple of tips that may assist you with the current version of Discover (v2013).

1/. To highlight 'Planned' holes.

In addition to adding the planned hole/s' collar (and survey entries if needed) information, add a single lithology entry for each planned hole to the lithology table, spanning it's entire depth (e.g. From 0 To 300). Assign an attribute such a 'Planned' to the appropriate lithology field. We'll be leveraging this via a lithology trace shade. When the updates are done, Save the changes, and 'Recache the Drillhole Project'.

In the projects 'lithology' legend (in the Legend Editor), add a new row, called 'Planned' and set a colour/pattern that stands out for planned holes (my example below is orange vertical stripes).

Then apply this to one or more sections. Example output as below:

2/. To separate drillholes by type

a. Add a 'Type' character field to your project's collar table, and attribute as necessary (such as 'RAB', 'RC' and 'Planned'). Save, and Recache the project.

b. Create 3 queries (I used Discover's Data Utilites>Select by Group) from this collar tab ...

Drillholes intersecting a defined section at depth are not displayed, even when assigning a wide envelope width.

Josh Knight — Tue, 21 Aug 2012 02:51:07 GMT

Solution

Make sure you check the “Show holes intersecting at depth” box in the Define New Section or Plan dialog. Any holes that intersect the drillhole envelope at depth should then be displayed on your section. If this
box is not checked only drillholes which are collared within the section envelope will be displayed on your section.

Calculation used for generating drillhole cross section

kbadmin — Wed, 31 Mar 2010 06:06:36 GMT
Discover does not plot the raw survey data. Instead an interpolation method known as �mid-point tangential averaging�or �back calculation� is used. This is the only method offered in Discover and is the default method in Discover 3D. Although it is a simple method, it does produce reasonable results.
Each survey point is considered to lie in the middle of a drillhole segment which has the dip and azimuth of the survey location. The dip and azimuth of the hole changes automatically halfway between each survey point. This has the affect of intersecting a midpoint in between the actual survey points, and may not actually intersect a survey point. It also means that the first and last interval of the trace will be half their expected length.
��
If there is no survey measurement at the start (0 m depth), the first record's Azimuth and Dip values are used for the initial segment. Similarly, at the end of hole, the last measured azimuth/dip is continued for the final segments.

Put simply, if your collar is at 0 m and finishes at 40 m and you have down hole surveys at depth intervals of 10 m, 20 m and 30 m, then Discover will compute the the end X,Y,Z coordinate of the first line segment using the midpoint distance between each depth interval (e.g. 0 m to 5 m). It then uses corresponding dip and azimuth values from the surveys (10 m measurement), to project the second line segment (5 m to 15 m). At this point it then uses the next Survey dip and azimu ...

Drillhole sections are displaying end of hole symbols as black squares

Josh Knight — Mon, 10 Aug 2009 01:38:57 GMT

Occurrence

The collar and end of hole symbols on existing or new sections/plans are displaying as black squares, rather than the correct symbols

Solution

After upgrading or installing Discover, you will need to restart Windows to ensure the font files are correctly registered.

After restarting the fonts will display correctly.

Is it possible to create a drill section with an inclined section plane?

kbadmin — Wed, 04 Feb 2009 01:13:37 GMT

A drillhole section can only be plotted with a 90 degree dip (vertical), the section plane cannot be inclined.
However in Discover3D the dynamic cursor plane can clip or slice datasets in real time at any angle or position.

Why are drillhole cross-sections displayed in non-earth co-ordinates in the map window?

Josh Knight — Tue, 11 Sep 2007 02:56:02 GMT
Occurrence

Drillhole cross-sections created using the Drillholes>Define New Section or Plan menu option display
the X axis co-ordinates in non-earth units, rather than real world units (e.g. UTM).

Solution

MapInfo Pro is a 2D only package, so the section's cannot be shown in their real 3D space.

Discover will only display cross-sections in real world co-ordinates if the section orientation/azimuth is
precisely parallel to one of the principal axes (i.e. E-W / 90 degrees or S-N / 0 degrees). If the section
orientation is either at an angle (e.g. 35 degrees) or even very slightly oblique (less than a degree) to
the either of the principal axes, the section mapper window will be displayed in non-earth units.

This is because Mapinfo requires a precise 1:1 ratio between the X and Y (depth in the case of
cross-sections) units in a mapper window. Sections not precisely parallel to the principal axes will
therefore have both an easterly and northerly component along the X axis. Neither of these components
will have a 1:1 relationship with the depth (Y) axis.

For these 'angled' sections, Discover utilises a non-earth system along the X axis, ensuring a 1:1 ratio with
the Y axis.

However once the section is added to a layout window (Drillholes>Add Section to Layout), or a section grid added (Drillholes>Draw Section Grid)
a map grid incorporating both the real world eastings and northings will be generated.

NOTE: The Discover>Map Grid or Autogrid will still display the inline distance, not easting/northings.

How do I adjust the height of the surface profile (eg topography, geochemistry, ground magnetics) displayed over a cross section in the layout window?

Josh Knight — Mon, 21 May 2007 04:44:05 GMT

Solution

The easiest way to do this is to use Drillholes > Define New Section or Plan to specify the
section. Click the Surfaces button in this dialog to open the Surface Display Selection dialog and
add the desired surface to the right-hand window. Tick the Relative Position option and either
specify an offset or use the Auto Vertical Offset. Choose Specify Scale 1:1 and click the
Accept Settings button to use the most current settings. (if you don’t click this button the last
setting will be re-displayed). Click OK and create the section.

Display the section in a layout using the Add Section to Layout menu option and once the
section is in the layout measure the size the profile is displayed at by either using the Ruler Tool or
reading off the cms from the layout border.

Depending on the size you want to plot the profile (ie. height of 15cm) work out the vertical scale
needed to be entered back in the

Datamine Discover KB - Generate Sections or Plans

How do I digitize (boundaries) on my sections?

How do I plot level or flitch plans?

How do I refresh my drillhole data and regenerate a section?

My drillhole collar positions do not match up with a DEM / DTM grid in the 3D view or drillhole cross-section.

SQLite Error creating section in Discover 2016 or 2017

Drillhole traces are not plotting correctly

How do I highlight different drillhole types on a section, such as Planned holes, or RAB vs RC vs DDH?

Drillholes intersecting a defined section at depth are not displayed, even when assigning a wide envelope width.

Calculation used for generating drillhole cross section

Drillhole sections are displaying end of hole symbols as black squares

Is it possible to create a drill section with an inclined section plane?

Why are drillhole cross-sections displayed in non-earth co-ordinates in the map window?

How do I adjust the height of the surface profile (eg topography, geochemistry, ground magnetics) displayed over a cross section in the layout window?