Astrometric and photometric characteristics of the SMC and MW samples. From left to right: PM sample, NN complete, NN optimal, and NN truncated-optimal samples. In the first four rows, we show distributions of proper motion in right ascension and declination, parallax, and G-magnitude, respectively, of the SMC (orange) and MW (blue) samples. In the last two rows, we show the color–magnitude diagram of the samples classified as SMC and MW, respectively. Color represents the relative stellar density, with darker colors meaning higher densities.