Smooth Surface Dialog Box

Smoothing Methods

Select Method

Specifies the type of surface smoothing to perform:

• Natural Neighbor Interpolation: Specifies NNI and disables the Kriging Method property group.
• Kriging: Specifies the Kriging method.

Kriging Method

Specifies the parameters for the Kriging surface smoothing method. Available when the Smoothing Methods property is set to Kriging.

Semivariogram Model

Specifies the semivariogram to use. For more information, see About Smoothing a Surface Using the Kriging Method.

Point Selection Method

Specifies the points to use for the surface smoothing extrapolation:

• Select Points: Selects all points inside a rectangle, polygon, surface, or parcel.
• Random Points: Selects random points inside a rectangle, polygon, surface, or parcel.
• Select All Points: Selects all points on a surface.

Select Points

Specifies the points that are selected. Available only when either the Select Points or Random Points parameters are selected. Click and follow the command line prompts to select the points.

Point Interpolation/Extrapolation Output

Output Locations

Specifies the output location for the points:

• Grid Based: Outputs points on a grid defined within specified polygon areas selected in the drawing.
• Centroids: Outputs points at the existing surface triangle centroids within specified polygon areas selected in the drawing.
• Random Points: Outputs a specified number of random points within polygon areas selected in the drawing.
• Edge Midpoints: Outputs a point at the midpoint of each selected triangle edge. Requires that surface triangles be displayed.

For more information, see About Point Interpolation/Extrapolation Output for Surface Smoothing.

Select Output Region

Specifies the area which to output the points. Click and follow the command line prompts to select the area.

Grid X - Spacing

Specifies the X distance between the grid lines. Available only when the Grid Based option for point output is selected. Click to digitize the spacing in the drawing area.

Grid Y - Spacing

Specifies the Y distance between the grid lines. Available only when the Grid Based option for point output is selected. Click to digitize the spacing in the drawing area.

Grid Orientation

The orientation direction for the grid in the Y and X directions. Available only when the Grid Based option for point output is selected. Click to pick two points in the drawing to define the orientation direction.

Number Of Output Points

Displays the number of points that are output.

Kriging Semivariogram Model

This area of the dialog box is displayed if the Kriging surface smoothing method is selected.

Parameter A

Specifies the semivariogram scale factor.

Parameter C

Specifies the semivariogram range factor.

Nugget Effect

Specifies the discontinuity at the origin of the semivariogram model. The magnitude of the discontinuity is called the nugget and must be greater than 0.

Graph display area

Displays the semivariogram model (in red) against the actual surface points (in white). You can visually verify both the model and the surface points at the same time.