Erase
Layer Erase is the ability to use the Overlay Dataset (Erase Data Set) to erase a Feature that overlaps the Source Dataset (Erase Data Set). For a detailed description of the erase operator, refer to the Overlay Analysis operator .
Instructions for use
- The type of Erase Data set must be Region Dataset. The type of Erase Data set can be Point, Line, Region Dataset.
- In the Erase Data set, only objects that fall outside the Erase Data set polygons are output to the Result Dataset.
Function entrance
- Spatial Analysis tab-> Vector Analysis-> Overlay Analysis-> Erase.
- Toolbox-> Vector Analysis-> Overlay Analysis-> Erase.
Parameter Description
- Source Data: Select the Datasource where the Erase Data set is located and the Dataset to be erased.
- Overlay Data: Select the Datasource and Erase Data set where the Erase Data set is located.
- Result Dataset: Select the Datasource where the Result Dataset is stored. Specify the name of the Result Dataset.
- Tolerance: The default tolerance value is automatically given according to the Dataset participating in the analysis. After the
overlay operation, if the distance between the two nodes is less than this value, the two nodes are merged. The default value for this value is the Fuzzy default value for the Clip Dataset (this value is set in Fuzzy under Tolerances in the Vector Dataset tab of the Dataset Properties dialog box).
- Compare Results: Set whether to compare results: Select the " Compare Results" check box to display the Erase Data set, the Erase Data set, and the Result Dataset in a new Map. It is convenient for users to compare the results.
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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