👉 The term "landplane" is a reference to the concept of a land and plane, which are two orthogonal planes in three-dimensional space. It refers to the geometric shape or arrangement of objects that are defined by their location on both the horizontal plane and the vertical plane (or plane of symmetry). In geometry, the concept of a plane can be thought of as a flat surface with no curvature, while the concept of a landplane is a more complex concept that involves the intersection of two different planes
