To determine the horizontal and vertical (3D) coordinates of an inaccessible point using angle measurement to this point and angle and distance measurements to three accessible points lying in the same plane as the inaccessible point. Note, that all four points must not be on the same line.
To enter this offset mode, click in the top left corner of the Topo Survey (Optical) dialog, click Measure to expand the sub-menu and select Plane and Corner.
Plane and Corner offset mode requires measurement of four locations: HA+VA measurement to the inaccessible point and HA+VA+SD measurements to three accessible points forming one plane with the inaccessible point.
After taking four measurements, MAGNET Field calculates horizontal and vertical coordinates and stores the inaccessible point to the job. The stored point has the icon in point listings of the current job.