Available with ArcGIS Image for ArcGIS Online.
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
Examples
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.
- Output layer type specifies the type of raster output that will be created. The output can be either a tiled imagery layer or a dynamic imagery layer.
- Save in folder specifies the name of a folder in My Content where the result will be saved.
Limitation
The Stream Link tool only supports a D8 input flow direction raster layer.
Environments
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:
- Output coordinate system
- Processing extent
Note:
The default processing extent in Map Viewer is Full extent. This default is different from Map Viewer Classic in which Use current map extent is enabled by default.
- Snap raster
- Cell size
- Mask
Credits
This tool consumes credits.
Use Estimate credits to calculate the number of credits that will be required to run the tool. For more information, see Understand credits for spatial analysis.
Output
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:
- Creator or GIS Professional user type
- Publisher, Facilitator, or Administrator role, or an equivalent custom role
- ArcGIS Image for ArcGIS Online
Resources
Use the following resources to learn more:
- Identifying stream networks
- Stream Link in ArcGIS REST API
- stream_link in ArcGIS API for Python
- Stream Link in ArcGIS Pro with the Raster Analysis extension
- Stream Link in ArcGIS Pro with the ArcGIS Spatial Analyst extension