Gridding method

[steckler]

Good morning, 

I created a grid which reprensents to top of a geological substratum based on available data from boreholes. 

I tried all the algorthms (inverse distance, kriging, triangulation etc).

When I check at the location of the existing borehole, for all boreholes there are always a difference (minor or major depending on the method).

Is there a way to impose at the location of the borehole the value as a true one after interpolation?

Thank you very much

Best regards

Mathieu

 

[Alison]

The contours in your map are based on the locations of cell in the RwGrd file, and not the boreholes themselves.  So, you will need to make adjustments to either the cell dimensions or your gridding settings.

 

1.  As far as the gridding settings go, if you have the "Smoothing" option turned on under the Special Options tab, it may help to also check on the "High Fidelity" option as well.  You could also experiment with the settings in the Smoothing tab.  If you have increased the Filter Size or Iterations values to something greater than 1, you should try changing these back to the default values of 1.

 

2. If this does not help, then it may help to decrease the size of the cells.  This is done through the Dimensions tab at the top of the RockWorks program window.

 

I hope this helps.  If you continue to have problems with this, we may need to take a look at your data to make further suggestions.

[steckler]

Dear Alison, 

Thank you very much again for your quick detailed answer.

I will investigate your advice and come back to you with the results

Best regards

Mathieu

 

[steckler]

Dear Alison,

I selected "high fidelity" and indeed it completely solved my problem. Thank you very much again for your precious help.

Best regards.

Mathieu