Raster Spatial Operations

Select IMAGE PROCESSING → PALETTE → RASTER SPATIAL OPERATIONS in the main menu.

Input Layers:

Select the first layer in the upper selection field.

Select the second layer in the lower selection field.

Only Visible Area: click on this box if the process is to be done in the visible area.

Spatial Operation: Select one of the three formats:

Aggregate Area: Adds a new area to the polygon.

Remove Area: Remove a determined area from the polygon.

Unite polygons: Attach two or more polygons keeping the attribute of one of them.

Output Layer Name: enter the name of the resulting image.

Projection: click on this button to open projection window to adjust its parameters.

Resolution: enter the values for X and Y axis resolution.

Click on the OK button.