Variation of LSR velocity with heliocentric distance (left) and galactocentric radius (right) for circular and non-circular velocity fields in the direction of B1741-312 at l = −2.14°, b = −1.0°. The curves labeled “Galactic rotation” are for a flat rotation curve with R₀ = 8.5 kpc, Θ = 220 km s^-1, and the non-circular velocity field interior to R_gal = 1.5 kpc is taken from Burton & Liszt (1978). The diagrams were constructed by taking equal steps in heliocentric distance, and the density of points represents the line-of-sight geometry and velocity gradients.