Weight maps for the D1 and D2 fields for each band. Each image covers 1° × 1°; black areas are regions without data. The grey-scale gives the 3σ depth for 5 pixel sources in 2″ apertures. Note that crosses of slightly shallower depth are present in each pointing due to the gaps between detectors (broad central crosses in each pointing) and also due to the use of single guide stars for many observations (narrow crosses present in individual quadrants in some pointings).