EWMN describes movement using a geometrical model that allows the user to observe and notate movement in an objective way, free of verbal ambiguity and emotional attachment. The notation utilizes a spherical system of coordinates, similar to latitude and longitude on a globe. Since the movement of a single axis of constant length free to move about one fixed end, will all be enclosed by a sphere, the free end will always describe a curved path on the surface of this sphere. Every limb in the body can be regarded as such an axis. Constructing the SoR: One direction on the horizontal plane of the sphere is selected as the starting position for all measurements. This direction is labeled zero (0). By measuring off intervals of 45 degrees, eight positions are obtained. Four vertical planes intersect the horizontal circle, they are perpendicular to it.

Source: Eshkol, N.; Harries, J. G., EWMN Part I. Israel: The Movement Notation Society; 2001.