2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/12927We have constructed a full-sky map of the far-infrared suitable for measuring Galactic reddening and extinction (Schlegel, Finkbeiner & Davis 1998: SFD). The SFD map is based upon extensive re-analysis of data from the COBE/DIRBE and IRAS satellite missions. We demonstrate that the maps can correct for extinction problems in the APM galaxy survey. We also determine the most dust-free regions for conducting cosmic microwave background or soft X-ray experiments of extragalactic objects.To appear in: Wide Field Surveys in Cosmology, eds. S. Colombi and Y. Mellier; Latex file, 4 pages with 2 figuresAstrophysicstext