Update
Layer update refers to the function of Overlay Dataset (Update Dataset) replacing the overlapped part of Source Dataset (Updated Dataset). Please refer to the Overlay Analysis operator for details of the update operator.
Instructions for use
- The Update Dataset and Updated Dataset must be of type Region Dataset.
- In the Updated Dataset, the parts that coincide with the Update Dataset are replaced and saved in the Result Dataset.
Function entrance
- Toolbox-> Vector Analysis-> Overlay Analysis-> Update.
Parameter Description
- Source Data: Select the Datasource where the Updated Dataset is located and the New Dataset.
- Overlay Data: Select the Datasource and New Dataset where the Update Data set is located.
- Tolerance: After the superposition operation, if the distance between two nodes is less than this value, the two nodes will be merged. 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 Dataset: Select the Datasource where the Result Dataset is stored. Specify the name of the Result Dataset.
Precautions
Before performing Overlay Analysis, please ensure that the data Projection of the operation is consistent, otherwise it may result in overlay Analysis failed.
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