In GEOVIA Surpac 2023 Refresh 2, there is a new graphical drillhole constraint form available. You can now graphically constrain drillholes with a polygon, solid, dtm or a wild card (*).

This will allow geologists, geotechnical engineers and mining engineers to just display the  drillholes in the area of interest. Eg. Drillholes that are above a pit, drilled through the underground workings etc.

Here are some tips on how to use the new constraint form

3DM constraints

• If you are wanting to see the drillholes that are within a solid
• Database>display>add new constraint

•  Select the 3dm option in the constraint type, select the solid and apply.

• Hide the faces of the solid and display the edges so you can see the drillholes within the solid.

• If you want to see all the holes that intersect a solid, then you would use the option “drillholes partially in the constraint.”

Table constraints

• You can create a table constraint based on northing

• If doing a constraint on an interval table, then select the table and the field. Eg you may want to see the holes with Gold>100 

• You can now also use a wild card ‘*’ to filter out the holes you want to display.

• Constraint files
  • You can use existing .dbc files but REMEMBER these were only applied to a table.
  • You can use the new xdbc format.
• Combinations
  • You can use the combination ‘or’

• You can use the combination ‘and’. NOTE: the constraints are 'and' by default. 

String Constraint

• You can now constrain the drillholes graphically by using a closed polygon

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