If you have created catchment areas using another software package and you want to be able to retrieve them in OALLEY, the area-import function will enable you to do so without having to recreate them.
OALLEY allows you to easily import areas in KML format.
To do this, go to the map, then use drag and drop to move your file directly onto the map:
The area(s) from the KML file will appear on the map, and will be added to the active folder.
To go further: