ETG_StreamLink

Stream Link

Assigns unique values to sections of streams between junctions. A Link is each section of Stream between two junctions, the stream head and a junction or a junction and the outlet.

Inputs:

A Stream raster dataset.
A D8 Flow Direction raster dataset
Output Raster name and format

Outputs:

A Stream Link raster. A unique integer value is assigned to each Stream section between junctions.

Example:

An example of Stream Link output.

Notes:

The input Stream raster should be represented as values greater than or equal to one on a background of NoData
The input Stream raster and the input D8 Flow Direction raster must have the same cell size and extent. In fact they should originate from the same DEM raster.
See Hydrological functions for more information on the hydrological functionality.
The input format accepted are file based rasters - ERDAS IMAGINE or Tagged Image File Format (TIFF).
The .NET ToolBox for ArcGIS Desktop accepts also FileGDB Raster inputs.
For file based rasters initially the name of the InputFlowDirectionRaster define the raster format:
- .img extension (for example raster1.img) - ERDAS IMAGINE image.
- .tif extension (for example raster1.tif - image.
- The initial InputFlowDirectionRaster format can be changed by selecting the desired output in the dialog.

Running Programmatically

(Go to TOP)

Parameters

Expression	Explanation
Function Name	StreamLink
<InputStreamRaster>	A String representing the input Stream raster dataset.
<InputFlowDirectionRaster>	A String representing the input Flow Direction raster dataset.
<OutputRaster>	A String - the full name of the output raster.

Running the function

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

UnitsDegrees

Language	Syntax
Python	subprocess.call([ETSPath, "StreamLink", "InputStreamRaster", "InputFlowDirectionRaster", "OutputRaster"])
.NET using ETSRun.exe	StartInfo.FileName = ETSPath StartInfo.Arguments = "StreamLink" "InputStreamRaster" "InputFlowDirectionRaster" "OutputRaster"
.NET using ETSOutX.dll	StreamLink(InputStreamRaster, InputFlowDirectionRaster, OutputRaster)
ArcPy	arcpy.StreamLink("InputStreamRaster", "InputFlowDirectionRaster", "OutputRaster")

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.

(Go to TOP)