Layout on the sky of all pointings included in the PDR-1 catalogue, for the two fields W1 and W4. Each of the four quadrants composing the pointings is shown and colour–coded according to the specific target sampling rate (TSR) over its area. The TSR is simply the ratio of the number of targeted galaxies over the number of potential targets. As shown, the average TSR is around 40%. Black quadrants correspond to a failure in the insertion of the mask for that specific quadrant and the consequent loss of all data.