Spectroscopic completeness map. This is the ratio of two adaptive-kernel number density maps, one for all the objects with z, and the other for all the photometric objects, both within the magnitude range 18 ≤ m_R ≤ 23. Contours are labeled with the completeness levels, and show that the spectroscopic completeness becomes slightly higher closer to the center. The magenta circle represents the virial region with radius R ≤ r_200,U.