Comparison of our DR maps (top row) with literature ones (bottom row) for three well-studied GCs, as annotated. The left panels show NGC 3201, compared with the optical map obtained with a method similar to ours (von Braun & Mateo 2001). The center panels show NGC 4372 compared with the Gaia DR2 A_G values for stars brigther than G ≃ 17 mag (Andrae et al. 2018). The right panels show NGC 6366 compared with the 3D reddening maps obtained from Pan-STARSS, 2MASS, and Gaia data (Green et al. 2019). The coordinate and color scales are tailored to match the different literature sources. In all panels, the solid circle represents r_h and the dashed circle – when visible – r_ℓ.