DGI Gridding Options

You can open the DGI Gridding Options dialog box by clicking <More Options> in the Gridding dialog box.

The DGI gridding method honors input data closely, and uses the SGL (Surface Gridding Library) to produce surfaces from widely varying data input points. DGI is the preferred method to use when gridding with fault traces to produce maps with well defined fault edges. This method creates a smooth surface by attempting to honor the input data values as closely as possible. DGI is the default gridding method in WinPICS . View image

This dialog box has the following options:

Input Data Restriction - Restrict points outside the range you want to grid. Read more.
Grid Computation - Select the weighting for your grid point re-evaluation. Read more.

When performing a DGI gridding computation, you can combine unequal weighting of the X/Y axes with rotation of the grid geometry to bias values along regional trends. You can also use control points to add bias.
Output Grid Shape - Change the bounding polygon options. Read more.

Close Following Boundary - This method uses a closed polygon boundary to limit the use of extrapolated values beyond the region of known values. View image

The DGI gridding default is to limit the gridding region to a closed polygon boundary.

Convex Hull - This method uses a convex polygon boundary to limit the use of extrapolated values beyond the region of known values. View image

No Boundary (Rectangular) - This method does not define a polygon boundary, and extrapolates values beyond the region of known values to the selected geometry. View image

Data Search for Interpolation - Set how many points to use to interpolate the grid. For example, you might configure this option when you have 2D lines where points are clustered.
Create DGI Log File - Select this check box to have WinPICS save the results of your gridding to a log file on your PC.

What do you want to do?