The VIKING (VISTA Kilo-degree Infrared Galaxy) survey is a medium-deep survey of 1500 square degrees over two areas of the extra-galactic sky with VISTA in zYJHKs bands to sample the restframe optical for galaxies at z>1. The VIKING survey area is split into two areas: an equatorial strip between right ascension 9 and 15.8 hours and 8 degrees wide; and a strip over the South Galactic Pole between right ascension 22 and 3.5 hours and 10 degrees wide. Original acknowledgement for data: We made use of data from the VIKING survey from VISTA at the ESO Paranal Observatory, programme ID 179.A-2004. Data proces sing has been contributed by the VISTA Data Flow System at CASU, Cambridge and WFAU, Edinburgh