CreateTriangulation()

Summary

Creates a Triangulated Irregular Network (TIN).

 

Syntax

tin = CreateTriangulation(string layer_set_name, array options)

 

Argument	Contents
Layer_set_name	The name of the point layer and set to use to create the TIN, separated by a vertical bar

 

Option	Type	Contents
Smooth	Integer	Smoothing level 1-3, or 0 for no smoothing
Field	String	The field to use for the elevation
Units	String	Elevation units that the field values are in (e.g. "meters" or "feet." Defaults to map units).

 

Returns

A TIN.

 

Notes

• If you are using all records, omit the vertical bar in set_name.

• CreateTriangulation() displays a progress bar. To add a Cancel button to the progress bar, precede the function call with an "on escape" clause. For more information, see Error Handling.

• The triangulation will store elevations in the units of the field values.

Example

// Open Elevdata.cdf in the Tutorial folder

layer_name = GetLayer()

point_tin = CreateTriangulation(layer_name + "|", {{"Field","Elevation"}})

folder = RunMacro("G30 Tutorial Folder")

CreateContourDB(point_tin, folder + "contours.dbd",

{{"Automatic", 10},{"Layer Name","Elevation Contours"}}) 

 

Error Codes

Error Type	Meaning
Error	The current layer is not a point layer, or the options are not of the required type, or the field containing the elevations has identical values for every record
Escape	The user clicked Cancel

 

See Also

Function	Summary
CreateContourDB()	Creates a line or area geographic file of the contours derived from a TIN
CreateHullDB()	Creates an area or a line DBD database based on a TIN
CreateTriangulationAreaDB()	Creates an area geographic file from the facets in a TIN, with slope and aspect values
CreateVisibilityMap()	Creates an area geographic file from a TIN to show the area that is visible from a certain height at a viewpoint
EstimateElevation()	Calculates a spot elevation using a TIN
TINElevations()	Gets the minimum and maximum elevations in a TIN
TINScope()	Gets the scope for a TIN