How to accurately measure the sitting direction of a house

Pull a thin line parallel to the gate, three meters away from the gate, and the height is more than one meter and forty centimeters, which is not disturbed by the surrounding building magnets. Put a one-foot high precision compass on the line, and the red line of the compass overlaps with the thin line drawn out. Aim the magnetic needle of the compass at 0 degrees and 180 degrees at the bottom of the compass, and aim at the red line of the compass on the side of the magnetic needle with one eye and overlap (it is not advisable to look at the magnetic needle). At this time, the compass is sitting on the mountain and the house is sitting. The power of its sitting comes from the earth itself and the stars in the solar system. According to the principle of three-dimensional metaphysics, it is deduced that the gas suffered by houses affects residents.