Multi-layer Union
Feature Description
Used to calculate the union of multiple polygon datasets. Performs intersection and segmentation operations on overlapping areas. The result dataset retains all objects from input datasets.
Parameter Description
| Parameter | Default Value | Description | Type |
|---|---|---|---|
| Input Overlay Datasets | Multiple polygon datasets for overlay analysis. Datasets must share the same coordinate system | DatasetVector | |
| Target Datasource | Specified datasource storing the result dataset | Datasource | |
| Result Dataset Name | Specified name for the result dataset | String | |
| Preserved Field Type (Optional) |
All | Attribute field type to preserve in overlay results. Options: All fields (including system fields), Only Object IDs, Only non-system fields (excludes SmUserID). Default preserves all attributes. | OverlayOutputAttributeType |
| Tolerances | 0.0 | Merges nodes when their distance is smaller than this value after overlay operation | Double |
Output
| Parameter | Description | Type |
|---|---|---|
| Union Result | Result dataset of overlay union operation | DatasetVector |