ETS_TINSlope

TIN Slope

Calculates the slope of the TIN Triangles of the input TIN in percent or degrees (0 to 90). Categorizes the triangles and groups them based on the slope. The user can input a text file to be used for defining the groups to be created. If not such file is provided the default grouping will be used.

Inputs:

Input TIN dataset.
Output polygon dataset.
Boolean slope option - Degree (false) or Percent (true).
Class Breaks text file (optional).

Outputs:

New Polygon feature dataset.

Notes:

A new field ET_SCode will be added to the polygon attribute table. The values in this field will indicate the slope groups.
Breaks file format - The file consist of lines with 2 comma delimited values. The first value is the break value and the second the Group ID. The Group ID can be numeric or string, the only requirement is to be unique. The first value will define the first group, if for example the value is 5, the first group will be 0 to 5.
Example text file:
- Break, Group
- 1, Flat
- 5,Low
- 10,Low To Moderate
- 25,Moderate
- 35,High
This example file will produce 6 groups
- 0 - 1 Flat
- 1 - 5 Low
- 5 - 10 Low To Moderate
- 10 - 25 Moderate
- 25 - 35 High
- > 35 Above High
If no Class Breaks file is specified, the following default breaks will be used:
Default breaks in degrees
- 0 - 0.5
- 0.5 - 1.5
- 1.5 - 3.0
- 3.0 - 6.0
- 6.0 - 12.0
- 12.0 - 25.0
- 25.0 - 45.0
- 45.0 - 90.0
Default breaks in percent
- 0 - 1.0
- 1.0 - 2.0
- 2.0 - 5.0
- 5.0 -10.0
- 10.0 -20.0
- 20.0 - 50.0
- 50.0 - 100.0
- Above 100

Example:

Output - default breaks in degrees:

Running Programmatically

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Parameters

Expression	Explanation
Function Name	TinSlope
<input tin>	A String representing the input TIN dataset.
<output dataset>	A String - the full name of the output polygon dataset.
<slope in percent>	A Boolean indicating whether the slope values will be in percent - True: in percent, False: in degrees.
{breaks file}	A String - the full path to the class breaks file.

Running the function

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, "TinSlope", "input tin", "output dataset", "slope in percent", "breaks file"])
.NET using ETSRun.exe	StartInfo.FileName = ETSPath StartInfo.Arguments = "TinSlope" "input tin" "output dataset" "slope in percent" "breaks file"
.NET using ETSOutX.dll	TinSlope(input tin, output dataset, slope in percent, breaks file)
ArcPy	arcpy.TinSlope("input tin", "output dataset", "slope in percent", "breaks file")

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.

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