The Horizontal Rotation is an angle in degrees to rotate the 3D view anti-clock wise from the south-north direction.
- When 0° is specified, the 3D view is orientated south-north. The observer is located to the south of the DEM.
- When 90° is specified, the 3D view is oriented west-east. The observer is located to the west of the DEM.
- When -90° is specified, the 3D view is oriented east-west. The observer is located to the east of the DEM.