Fig. 1
Distribution on the sky of the SDSS-DR14/eBOSS spectroscopy in J2000 equatorial coordinates (expressed in decimal degrees). Cyan dots correspond to the 1462 plates observed as part of SDSS-I/II. The purple area indicates the 2587 plates observed as part of SDSS-III/BOSS. The red area represents to the 496 new plates observed as part of SDSS-IV (i.e. with MJD ≥ 56 898).
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