How to measure the foundation of private houses in Liangshan, Sichuan?

The foundation of private houses in Liangshan, Sichuan is bounded by walls, or by walls, and the area measurement is only circular based on the vertical projection of prominent parts such as balconies or stairs. The measurement method of homestead is to take the wall as the boundary, or the wall as the boundary, and calculate the area of homestead based on the vertical projection of prominent parts such as balcony or stairs. The measurement of homestead is usually calculated by the staff on the spot, and finally the area of homestead is obtained. In addition, the area of the homestead is also limited, and the limiting standard is mainly the number of rural villagers and their geographical location.