Altitude
| Type: | Altitude |
| Style: | 90° - 0° - 90° - 0° running clockwise from the 90° point (i.e. the throne) |
| Geometry: | Circular, concentric |
| Unit of measurement: | Degrees of arc |
| (Numbering) starts at: | 0 |
| (Numbering) ends at: | 90 |
| Numbered: | every 10 degrees |
| Repeats: | 4 times |
| Divided every: | 10 (Degrees of arc) |
| then every: | 5 (Degrees of arc) |
Scale located on: Tympan, Womb or Back .