CreateContourDB()

Creates a line or area geographic file of the contours derived from a TIN.

CreateContourDB(tin t, string db_name, array options)

Argument	Contents
t	A TIN
db_name	The name of the output geographic file

Option	Type	Contents
Areas	String	"Yes" to create an area geographic file, "No" to create a line geographic file
Layer Name	String	The name for the new layer
Label	String	The label for the new layer
Automatic	Integer	The number of contour levels desired, 2 or more; if null use the Fixed and Major options to set the contour intervals
Fixed	Real	The minor contour interval
Major	Real	The major contour interval; there will be thicker contours at the major contour intervals unless the major contour interval equals the minor contour interval
Max Contour	Real	The maximum contour value
Enclose	String	"Yes" to enclose the convex hull of the points, "No" otherwise

The Major option is only available for line geographic files.
Based on the data, there may be more or less contour levels than the number chosen with the Automatic option.
Use the Max Contour option to limit the contours to lower elevations, in areas where there are abrupt peaks.

// Open Elevdata.cdf in the Tutorial folder

SetLayer("Elevation Layer")

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

folder = RunMacro("G30 Tutorial Folder")

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

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

Error Type	Meaning
Error	The TIN compound variable is null, or the options are not of the required type

Function	Summary
CreateTriangulation()	Creates a Triangulated Irregular Network (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