Introduction Understanding the origin of the peculiar velocity of the Local Group and the dipole in the Cosmic Microwave Background is one of the major goals of the study of large-scale structures. A more complete knowledge of the distribution of galaxies in redshift space as well as in distance space will improve the reconstructed galaxy density fields and reduce the diversity in the theoretical predictions.
All methods produce new results, but all suffer from limitations and selection effects.
The combination of data from an optical galaxy search, a NIR survey and a systematic blind H I survey will allow us to examine the large-scale structures behind the southern Milky Way and the peculiar velocity field associated with them. Redshift independent distance estimates can be obtained via the NIR Tully-Fisher relation.