Desurvey Settings

An explanation of fields and properties

Desurvey Settings Dialog

Choose

When

Desurvey Method:

Straight Line Segments

Traces are linear or near linear.

Radius of Curvature

Traces exhibit significant downhole deviations in azimuth or inclination (recommended).

Desurvey Options:

Include direction from collars table as well as from surveys table

The collars table contains collar survey data; i.e. it has azimuth and inclination values at a depth of 0

  • which are either not included in the surveys table

or

  • when there is no downhole survey table available.

Subdivide samples to smooth string

Drillhole is curved and current sample lengths give sharp angles between samples.

 

Trace to honor sample centers as generated by the DESURV or HOLES3D process

Drillhole is curved but display of the drillhole strings is required to mimic those produced by DESURV or HOLES3D.

note.gif (1017 bytes) Dynamic drillhole representations are best for display purposes; the collar is correctly located and the samples meet.

 

Static drillhole representations (from DESURV or HOLES3D) produce desurveyed samples which honor the center point of each sample but will have gaps when the hole is curved. These should be used for grade interpretations.  

  openbook.gif (910 bytes)   Related Topics

 

 Defining and building drillholes