Leiden/Argentine/Bonn (LAB) Galactic HI survey

This survey correspond to 21-cm emission from Galactic neutral hydrogen over the entire sky. The following map is the result of observations made using the Dwingeloo 25m telescope (δ > -27°) and the Villa Elisa 30m telescope (δ < -25°). The effective resolution of the map is 40' for δ > -27°, 35' for δ < -25°, and 37.5' for -27° < δ < -25°.
(see http://adsabs.harvard.edu/abs/2005A%26A...440..775K).

Additional references:

For more information: http://www.astro.uni-bonn.de/en/download/data/lab-survey/

In units of K km/s: HI_LAB_II_1_256.fits

In units of column densities: HI_LAB_II_1_256_nh.fits