Identity Features
Function Overview
The Identity Features tool calculates the geometric intersection between input features and identity features, then assigns attributes from the identity features to the intersecting input features. It preserves the geometry of all input features while appending attribute information from the identity features, integrating spatial and attribute data.
Use Cases
Administrative Division And Land Use Analysis: Cut land use data, such as cultivated land, forest land, and construction land, by administrative boundaries such as province, city, or county, and summarize land use types and areas within each administrative unit.
Infrastructure And Planning Zone Management: Analyze the distribution of linear infrastructure, such as roads and pipelines, within planning zones such as residential or industrial areas.
Natural Resources And Ecological Conservation: Overlay forest distribution maps with protected area boundaries to analyze forest types and areas inside and outside protected areas.
Disaster Assessment And Emergency Response: Overlay affected areas, such as flood inundation zones, with settlement data to calculate affected population and buildings.
Parameters
Basic Settings (Required)
| Parameter | Description | Data type |
|---|---|---|
| Input vector file | Features to identify. | Point, line, polygon |
| Input vector file | Features used to identify the input features. | Point, line, polygon |
| Output path | Storage path for the output result. | Folder path |
| Output file name | File name of the output vector file. | Text, without extension |
Advanced Settings (Optional)
| Parameter | Description |
|---|---|
| File format | Output file format. The default is GPKG VectorData (.gpv). PostGIS VectorData (.pgv), ESRI Shapefile (.shp), Keyhole Markup Language (KML) (.kml), GeoJSON (.geojson), AutoCAD DXF (.dxf), and other formats are also supported. |
| Output specified fields | When enabled, output fields can be configured manually. When disabled, the original field structure is retained. |
| Reproject | When enabled, the spatial reference of the output file can be set. Otherwise, the coordinate system of the input features is used. |
Notes
Coordinate System Consistency
- All input layers must use the same coordinate system. A projected coordinate system is recommended.
- If coordinate systems differ, use a projection tool to convert them to a common coordinate system first.
Topology Error Handling
- Check for gaps and overlaps before running the tool, for example with a topology check tool.
- Set an XY tolerance for data with topology issues. The default is 0.001 meters.
Operating Steps
Step 1: Start The Tool
Open the Geoprocessing Toolbox, go to Analysis Tools > Overlay Analysis, and double-click Identity Features to open the tool pane.
Step 2: Set Parameters
-
Basic parameter configuration
In Basic Settings, enter the features to identify, output path, and output file name. All parameters are required.
-
Advanced parameter configuration
In Advanced Settings, configure optional parameters as needed, including output file format, specified output fields, and reprojection.
Step 3: Run And Monitor The Task
Click Run to start processing. You can view progress, run time, and completion status in the task list.