| Key Reference Point |
Use |
| Floor (defined by multiple reference points) |
Allows WhMD users to be oriented similarly in 3-D digital space. |
| Wheelchair mid-axle point (defined by the mid-point of the left and right wheel hubs) |
Allows WhMD users to be oriented similarly in 3-D digital space. |
| Seatback plane (defined by four corner points) |
Informs the 3-D digital model of WhMD and some seated body depth measures. |
| Seat support surface plane (defined by four corner points and one point at the interface of the occupant & seat surface i.e. compressed seat surface) |
Informs the 3-D digital model of WhMD and some seated height body measures. |
| Left and right arm support surface planes (defined by four corner points each) |
Informs the 3-D digital model of WhMD. |
| Foot support surface planes (defined by four corner points each) |
Informs 3-D digital model of WhMD and some WhMD length measures. |
| Anterior most point (foot or foot support surface) |
Used to measure Occupied Length. |
| Posterior most point (head, arm, WhMD, or accessory) |
Used to measure Occupied Length. |
| Lateral most point, left (arm, leg, WhMD or accessory) |
Used to measure Occupied Width. |
| Lateral most point, right (arm, leg, WhMD or accessory |
Used to measure Occupied Width. |
