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Stream Link

The Stream Link tool assigns unique values to sections of a raster linear network between intersections.

The output is a hosted imagery layer.

Learn more about identifying stream networks


Example applications of Stream Link include the following:

  • Analyze a stream network by assigning unique IDs to the stream links.
  • Create a stream link result to be used as input to the Watershed tool, quickly creating watersheds based on the stream junctions.

Usage notes

Stream Link includes configurations for input layers and the result layer.

Input layers

The Input layers group includes the following parameters:

  • The Input stream raster parameter specifies the linear stream network to be used for analysis. It can be created by assigning a threshold value to the results of the Flow Accumulation tool.

    The linear stream network should be represented as values greater than or equal to one on a background of NoData.

  • Input flow direction raster defines the direction of flow out of each cell.

    The flow direction must have been determined by the D8 method.

Result layer

The Result layer group includes the following parameters:

  • Output raster name is the name of the output raster that contains the stream link result.

    The name must be unique. If a layer with the same name already exists in your organization, the tool will fail and you will be prompted to use a different name.

  • Save in folder specifies the name of a folder in My Content where the result will be saved.


The Stream Link tool only supports a D8 input flow direction raster layer.


Analysis environment settings are additional parameters that affect a tool's results. You can access the tool's analysis environment settings from the Environment settings parameter group.

This tool honors the following analysis environments:


The output is a raster with the linear stream network after unique values are assigned to sections between intersections.

Usage requirements

This tool requires the following licensing and configurations:


Use the following resources to learn more: