Density, ρ, of Mira variable stars as a function of galactocentric coordinates (the X axis is in the Sun-Galactic centre direction such that X_⊙ = +8.2 kpc) in the ranges |X|≤2750 pc, |Y|≤2750 pc, and 700 pc <  |Z|< 1500 pc. Bin sizes are 500 × 500 × 200 pc, which implies a Poissonian error of the density in each bin equal to with ρ₁ = 20 star kpc⁻³; for ρ = 0, Δρ = ρ₁. Over-imposed white contours show isodensity regions.