Creating Geometric Operations

Centroid

The centroid operation defines the center point of the bounding box where the geometry is inserted in. Therefore depending on the polygon shape the centroid can or cannot be inside of it. The user can also select the columns to be included in the new output layer.


Minimum Bounding Rectangle


The MBR operation generates the minimum bounding rectangle where geometry is inserted in.


Convex Hull

The convex hull operation defines for any subset of the plane (set of points, rectangle, simple polygon), its smallest convex set that contains that subset.

Area

The area operation calculates the of the geometry.

Perimeter

The perimeter operation calculates the perimeter of the geometry.

Line

The line operation calculates the length of line geometry.

Click on PROCESSING → VECTOR PROCESSING → GEOMETRIC OPERATION.


Select from the list the layer to be geometric processed. To make easier to find the layer the user can enter a name in the filter field.

Click on the Next button.


Select the properties to be included in the operation and click on the right arrow button to transfer to the right list.

Click on the Next button.


Select the centroid operation.

Note: 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.

Select one of the available methodologies.

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.

Select one type of repository by clicking on the button to save the output layer as a file or on the button to save it in the database.

Enter the output layer name and click on the Finish button.