Function Description
Identify (Same) refers to the intersection operation on the Source Dataset and Overlay Dataset. Please refer to the Introduction to Overlay Analysis for details.
Function entrance
- Spatial Analysis tab-> Vector Analysis-> Overlay Analysis-> Same.
- Toolbox-> Vector Analysis-> Overlay Analysis-> Same.
Parameter Description
- Source data: Select the Source Dataset and the Datasource where the Source Dataset and the Datasource are located.
- Overlay Data: Select the Dataset that is "same" as the Source Dataset and the Datasource where it is located.
- Keep Overlaps of Source Data: When the Topology of two pieces of data is relatively complex, for example, the source data and Overlay Data are overlapped, select the parameter and output according to the overlapping relationship of the source data. For example, both the source data and Overlay Data have two levels of overlap. If it is not checked, the Output Result object has four levels of overlap. If it is checked, the two levels of overlap of the source data are maintained, so as to ensure that the results are correct.
- Tolerance: The default tolerance value is automatically given according to the Dataset participating in the analysis. After the
superposition operation, if the distance between the two nodes is less than this value, the two nodes are merged, and the default value of this value is the Fuzzy default value of the Clip Dataset. This value can be set in Fuzzy under Tolerances in the Vector Dataset tab of the Dataset Properties dialog box.
If Fuzzy is not set in the Dataset Properties, the tolerance defaults here are relative to the Dataset's coordinate system, as described in the Tolerance description .
- Result Data: Select the Datasource where the Result Dataset is stored. Specify the name of the Result Dataset.
- Field Settings: Select Field from Source Dataset and Overlay Dataset as Select Fields of Result Dataset.
- Keep All Source Data Fields: Select the check box to keep all source data fields. If the source data and the Overlay Data have the same name, the field name from the source data in the Result Dataset is "field name _ 1", and the field name from the Overlay Data is "field name _ 2".
- Keep All Overlay Data Fields: Select the check box to keep all Overlay Data fields. If the source data and the Overlay Data have the same name, the field name from the source data in the Result Dataset is "field name _ 1", and the field name from the Overlay Data is "field name _ 2".
Caution: performing Overlay Analysis, please ensure that the data Projection of the operation is consistent, otherwise it may lead to superimposed Analysis failed.
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