Select the points and lines that you want to use to define the vertices of a surface in the model viewport (may require that the layer is unlocked to allow selection):

Click the upper portion of the Surface button to initiate the process:

This will show the Surface Parameter dialog:

Method - defines the method used to generate the surface:

•Triangulation - creates a TIN (triangulated irregular network) surface with no interpolation.  This is best suited for large data sets such as ground surfaces.

•Kriging - creates a smoothed grid surface based on a statical weighting of data from nearby data points.  This is the preferred method as surface-to-surface relationships can be controlled using the Surface tools, but is best suited for small data sets with less than 1000 data points.

Line Sampling - defines parameters used when sampling lines to control surface generation:

•Interval - this value indicates the sampling interval used along a line - i.e. if set to 2.5m, 4 points will be forced on an 11m line.

•Variance - when the line consists of more than one line segment (i.e. polyline) the variance defines the maximum allowable angle between segments.  In the case that the value is 0 (as shown) all points will be recorded.

Hull Settings - defines the parameters to perform a concave hull:

•Use Hull - indicates if a concave hull is performed.

•Hull Value - an arbitrary value (depending on the data being processed) between 0.01 (full hull) and 1 (no hull) that determines the degree of hull that is applied.

Click the OK button to create the surface:

Data is added to the model (added to the default Surfaces layer):

Click the Import Surface button:

Select the TIN file to import:

Data is added to the model (added to the default Surfaces layer):

Select the surface that you want to export (may require that the layer is unlocked to allow selection):

Click the Export Surface button:

Select the folder to export data into and set the file name:

Click the Save button.