I report on methods for the estimation of stellar parameters and elemental abundances, including [Fe/H], [C/Fe], and [Mg/Fe], for very large samples of stars in the disk and halo of the Milky Way, making use of a combination of narrow-band photometry from the J-PLUS and S-PLUS surveys and broad-band photometry from Gaia DR3. The techniques employed can achieve estimates with precisions that are commensurate with that obtained from low- and medium-resolution spectroscopy. I summarize the identification of on the order of 0.5 million carbon-enhanced metal-poor (CEMP) stars for future exploration of the chemo-dynamical properties of CEMP-no and CEMP-s stars in the halo and disk systems of the Galaxy.