Increasingly, large surveys of the sky in multiple wavelength bands are becoming an important part of how astronomy is being done. These surveys produce huge homogeneous datasets, and as such are prime material for dissemination and analysis through the VO. As an example, the KIDS survey (see Fig. 1), which will map 1500 square degrees of sky in ugriZYJHK using ESO's VST and VISTA telescopes, and which is expected to start in 2007, will generate some 15 TB of pixel data, as well as several TB of derived source parameters. More than 100 TB of raw data will have to be processed.