ETS_TINPeaksSinks

Identify and extract Sinks and Peaks from a TIN

Analyses the triangles of the input TIN, finds and extracts the nodes that represent sinks (pits) or peaks to a Point dataset.

Input TIN dataset.
Output point dataset.
A Boolean indicating whether the result will be Point or PointZ (optional).
A Boolean indicating whether the flat triangles will be included in the analysis (optional).

A TIN node participates in several triangles, each triangle is created from 3 nodes.
If a node has maximum value in all triangles in which it participates it represents a Peak.
If a node has minimum value in all triangles in which it participates it represents a Sink or Pit.
While the peaks in most of the cases represent natural features, the sinks with some exceptions (natural lakes and depression) are caused by incorrect data or interpolation.
New fields are added to the point attribute table.
- ET_Spot - the Z value of the Node.
- ET_Type - the type of the node - Peak or Sink.

Peak node.

Sink node.

Parameters

Expression	Explanation
Function Name	ExtractTinPeaksAndSinks
<input tin>	A String representing the input TIN dataset.
<output dataset>	A String - the full name of the output point dataset.
{3D features}	A Boolean indicating whether the result will be Point or PointZ. True will create PointZ features. The default is False, which will create Point features.
{ignore flat triangles}	A Boolean indicating whether flat triangles will be included in the analysis. The default is True - flat triangles will be excluded from analysis.

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, "ExtractTinPeaksAndSinks", "input tin", "output dataset", "3D features". "ignore flat triangles"])
.NET using ETSRun.exe	StartInfo.FileName = ETSPath StartInfo.Arguments = "ExtractTinPeaksAndSinks" "input tin" "output dataset" "3D features" "ignore flat triangles"
.NET using ETSOutX.dll	ExtractTinPeaksAndSinks(input tin, output dataset, 3D features, ignore flat triangles)
ArcPy	arcpy.ExtractTinPeaksAndSinks("input tin", "output dataset", "3D features", "ignore flat triangles")

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.