20-3 Soldner coordinates: geodetic parallel coordinates 437
P F
x = y c
y = x c
P S
(1)
(2)
P 0
„
x 0 = 0
y 0 = 0
«
↓
↓
Fig. 20.5. Soldner coordinates as elements of an ellipsoid-of-revolution. y = const. (1), x = const. (2).
Fig. 20.6. An example of a Soldner map, centered at the T¨ ubingen Observatory, Germany, original map.
x ≡ y c , y ≡ y c .
P F
x = y c
y = x c
P S
(1)
(2)
P 0
„
x 0 = 0
y 0 = 0
«
↓
↓
Fig. 20.5. Soldner coordinates as elements of an ellipsoid-of-revolution. y = const. (1), x = const. (2).
Fig. 20.6. An example of a Soldner map, centered at the T¨ ubingen Observatory, Germany, original map.
x ≡ y c , y ≡ y c .