Frequently Asked Questions

Category: Geological Modeling

FAQ

Short Answer

 Additional Information
How do I generate a regularized model using REGMOD where a field value is to be accumulated? REGMOD calculates the average of values when sub-blocks are combined, they are not accumulated. An accumulated grade value (e.g. Block revenue) may be produced by converting the revenue field into a pseudo grade; dividing by the subcell volume. Run REGMOD, and finally convert back from the pseudo grade to a revenue field. An Example macro is provided under additional information. In the following example VALUE is the revenue field to be accumulated using REGMOD.

!rem VALUE is the $ revenue value for each subcell. 
!rem Convert VALUE to a pseudo grade by dividing by the volume, and then REGMOD 
!gentra &in(revmod),&out(t1) 
MUL VOL XINC YINC 
MUL VOL VOL ZINC 
DIV VALUE VALUE VOL 
ERA VOL 
END 
OK 
!regmod &in1(lgprot1),&in2(t1),&out(t2),*f1(VALUE) 
!rem Now convert back to a $ revenue value per cell 
!gentra &in(t2),&out(revmod2) 
MUL VALUE VALUE FILLVOL 
END 
OK
Can I evaluate above a DTM when using a rotated model? If so, how? Datamine does not support the 'evaluate above a DTM' command in the Design Window for rotated models. A work around is described in the additional information. The recommended method for evaluating a rotated block model above a DTM is to turn the DTM into a solid (enclosed) wireframe, and then 
use the evaluate-wireframe option. This will allow the evaluation of solid wireframes against a rotated model. 
There are several ways of creating a solid wireframe from a DTM. For example, put a boundary string around the DTM and then use the translate-string command to copy the string so that it is above the model. Link the two strings, endlink the new string and combine with the existing DTM to create an enclosed wireframe.

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