HI4PI Low and Intermediate Velocity HI
HEALPix ring, res 10 (Nside=1024)
Original Data Source
Lenz et al. (2017) used data from the HI4PI all-sky survey of HI 21-cm line emission to produce an all-sky map of H I column density for gas at |vLSR| < 90 km/s. The interstellar reddening map Lenz et al. derived from these data is also available and is described here.
More details can be found in: