ETS_TINContours

Interpolate Contours from TIN

Interpolates contours from a TIN. The contours can be created as PolylineZs with constant Z values representing the elevation.

Input TIN dataset.
Output polyline dataset.
Base value - the elevation from which to begin generation of contours (lowest contour value).
Contour interval - elevation difference between adjacent contours in map units.
A Boolean indicating whether the output to be Polyline or PolylineZ feature class (optional).
An Integer specifying a factor to be used for smoothing output contours (optional).

If flat triangles (see Surface types ) are present, some small problems might occur in the contours. These problems are easy to identify using Export Nodes Wizard (ET GeoWizards). Since the contour lines never intersect each other, there should not be Regular Nodes in the contour layer. A regular node in this case will indicate an error (most probably caused by a flat triangle). The excess polyline can be deleted.
If "Smoothness" parameter is specified the output contours will be smoothed using B-spline smoothing algorithm.
The "Smoothness" parameter defines the number of points in the output curve. The allowed values ( 2 to 20 ) in fact are point multiplier. The number of vertices of the original polyline multiplied by this value will give the number of vertices of the smoothed polyline. The larger the value of the Smoothness parameter, the slower the process will be. In most of the cases a value of 5 (default ) will create smooth and representative contours.
A new field ET_Height is added to the attribute table. The values of this field contain the Z value for each contour.

Parameters

Expression	Explanation
Function Name	InterplolateContoursTin
<input tin>	A String representing the input TIN dataset.
<output dataset>	A String - the full name of the output polyline dataset.
<base contour>	A Double representing the elevation of the contour from which to begin generation of contours.
<contour interval>	A Double representing the contour interval.
{3D contours}	A Boolean indicating whether the output to be Polyline or PolylineZ feature class.
{smoothness}	An Integer cpecifying that the output contours will be smoother using the parameter value.

ETGWPath used in the table below is the full path to ETGWRun.exe (E.G. "C:\Program Files\ETSpatial Techniques\ETSurface\ETSRun.exe")

Language	Syntax
Python	subprocess.call([ETSPath, "InterplolateContoursTin", "input tin", "output dataset", "base contour", "contour interval", "3D contours", "smoothness"])
.NET using ETSRun.exe	StartInfo.FileName = ETSPath StartInfo.Arguments = "InterplolateContoursTin" "input tin" "output dataset" "base contour" "contour interval" "3D contours" "smoothness"
.NET using ETSOutX.dll	InterplolateContoursTin(input tin, output dataset, base contour, contour interval, 3D contours, smoothness)
ArcPy	arcpy.InterplolateContoursTin("input tin", "output dataset", "base contour", "contour interval", "3D contours", "smoothness")

Notes:

<> - required parameter
{} - optional parameter
See examples for Python , .NET or ArcPy
The argument separator for StartInfo.Arguments is space. If a string might contain a space, you need to double quote it.