Coordinate system
R
Tangent-Sphere 
1
1
0
Cardioid 
0
Bispherical 
Toroidal 
Inverse Prolate Spheroid 
0
Inverse Oblate Spheroid 
0
| Coordinate system
| R |
|
|
|
|
|
|
| Tangent-Sphere
|
|
| 1 |
| 1 | 0 |
|
| Cardioid |
|
|
|
|
| 0 |
|
| Bispherical |
|
|
|
|
|
|
|
| Toroidal |
|
|
|
|
|
|
|
| Inverse Prolate Spheroid |
|
|
|
|
| 0 |
|
| Inverse Oblate Spheroid |
|
|
|
|
| 0 |
|