DESI Legacy Survey r HiPS

The DESI Legacy Imaging Surveys (http://legacysurvey.org/) are a combination of three public projects (the Dark Energy Camera Legacy Survey, the Beijing-Arizona Sky Survey, and the Mayall z-band Legacy Survey) that will jointly image ~14,000 deg2 of the extragalactic sky visible from the northern hemisphere in three optical bands (g, r and z) using telescopes at the Kitt Peak National Observatory and the Cerro Tololo Inter-American Observatory. The combined survey footprint is split into two contigous areas by the Galactic plane. The optical imaging is conducted using a unique strategy of dynamically adjusting the exposure times and pointing selection during observing that results in a survey of nearly uniform depth. As of DR10, the Legacy Surveys inference model is being self-consistently expanded to > 20,000 square degrees by incorporating additional DECam data from NOIRLab that includes extra optical bands (g, r, i, z).