Geometric Operations
It is accessed through:
Processing > Vector Processing > Geometric Operation...
- Select one layer in the List of Layers
- Click Next.
- Choose the attributes that will compose the output layer (skip this step if all attributes are desirable)
- Select the attributes in the Available Properties list.
- Move the selected attributes to Used Properties list.
- Click Next.
- Choose the operation(s)/methdology and output layer name/repository:
- Operations:
- Convex Hull / Centroid / Minimum Bounding Rectangle (MBR) - Each operation will generate a geometry attribute in a distinct output layer suffixed by the operation name.
- Area / Line / Perimeter - These operations will generate numeric attributes in all output layers generated.
- Methodology:
- All Objects - Selects all layer objects to perform the operation.
- Aggregated Objects - it aggregates all objects (generating only one) to perform the operation.
- By Attributes - it aggregates the objects with the same attribute in groups and perform the operation over the groups.
- Output: Inform the Output Repository
- Clicking on
to select the output
directory and inform the new layer name, or - Clicking on
to select the Data
Source
repository and after - Inform the new Layer Name to store the operation result.
- Click Finish to perform the operation, Back to change some parameters or Cancel to close the interface.
Usage tips:
The Geometric Operation result can be stored in different TerraLib data sources. Check data source selector for more details on how to select a data source.