Symmetric Difference (XOR)
Feature Description
Intersection difference (symmetric difference) refers to performing inverse intersection operation between the source dataset and overlay dataset. For details, see Overlay Analysis Tools.
When using this feature, both the source dataset and overlay dataset must be region datasets.
Feature Entry
- Toolbox->Vector Analysis tool->Overlay Analysis->Intersection Difference (Symmetric Difference)；
- Spatial Analysis Tab->Vector Analysis->Overlay Analysis->Intersection Difference (Symmetric Difference)；
Parameter Description
- Source Dataset: Select the source dataset and its datasource for performing symmetric difference.
- Overlay Data: Choose the dataset and its datasource to perform symmetric difference with the source dataset.
- Result Dataset: Select the datasource to store the result dataset and specify its name.
- Field Settings: Select fields from the source dataset and overlay dataset as selected fields for the result dataset. Click "OK" to save the selected fields in the result dataset.
- Tolerances: After overlay operation, if the distance between two nodes is smaller than this value, they will be merged. The default value is the fuzzy tolerance of the clipped dataset, which can be set under Fuzzy in the Tolerances section of the vector dataset tab in dataset properties dialog.
If fuzzy tolerance is not set in dataset properties, the default tolerance here depends on the dataset's coordinate system. For details, see Tolerance Description.
- Keep All Source Data Fields: Check this box to retain all source data fields. If source data and overlay data have fields with identical names, the result dataset will name them as "FieldName_1" (from source) and "FieldName_2" (from overlay).
- Keep All Overlay Data Fields: Check this box to retain all overlay data fields. Naming conventions for duplicate fields follow the same rule as above.
Notes:Before performing overlay analysis, ensure all datasets share the same projection; otherwise the analysis may fail.
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