We have redesigned the Grid Data tool in Surfer to give you more clarity, flexibility, and validation when gridding. At any point in the Grid Data dialog you can:

• Click Finish to commence gridding with the default parameters
• Click Skip to End to skip to the Output page
• Click Back to return to the previous screen.
• Click the X in the top right corner of the Grid Data dialog to cancel out of gridding altogether.

1. Click Home | Grid Data | Grid Data to access the new gridding wizard.
2. Choose your preferred gridding method from the options on the left
3. In the right-hand section, choose your input data file(s), and specify the appropriate data columns for the X, Y and Z variables. Click Next.
   1. If kriging or cokriging is selected as the gridding method, the next page will be the Variogram Modelling page. You can read more detailed information on variogram modelling here: Click Next when finished.
4. The Options page opens. Here you can choose the various search, anisotropy, breaklines or fault files for your gridding method. Click Next when finished.
5. The Cross-Validation page opens. This page provides an indicator of the accuracy of the selected model via cross-validation of randomly selected data points. Click Next when finished.
6. The Output page opens. Here you can specify the following options:
   1. The geometry of the output grid
   2. The Z limits of the output grid (if desired)
   3. Whether to Assign NoData using a polygon during gridding
   4. Whether to add the new output grid back into the plot as a new map layer
7. Click Finish to complete gridding

Updated August 2019