XRSPACE_LOCALFLOOR: string = 'local-floor'

Local Floor - represents a tracking space with a native origin at the floor in a safe position for the user to stand. The y axis equals 0 at floor level, with the x and z position and orientation initialized based on the conventions of the underlying platform. Floor level value might be estimated by the underlying platform. When using this reference space, the user is not expected to move beyond their initial position much, if at all, and tracking is optimized for that purpose. For devices with 6DoF tracking, local-floor reference spaces should emphasize keeping the origin stable relative to the user's environment.