This is similar to the temperature forecast maps that you see on the evening news or in some newspapers. Ganymede's day is just over 7 Earth days long, the same time it takes to orbit Jupiter once. To compare this temperature map to surface features of Ganymede, you can look at this Ganymede Image taken during the Ganymede 1 orbit. The PPR map covers almost the same area as the image but is rotated about 30 degrees to the west. Ganymede View of Ganymede from the Galileo spacecraft on approach to its first encounter with the Satellite.
North is to the top of the picture and the sun illuminates the surface from the right.
The finest details that can be discerned in this picture are about 13.4 kilometers across. Fine Details of the Icy Surface of Ganymede Dramatic view of fine details in ice hills and valleys in an unnamed region on Jupiter's moon Ganymede. North is to the top of the picture and the sun illuminates the surface from the left. In the right hand version the processing has been changed to bring out details in the shadowed regions that are illuminated by the bright hillsides. The brightness of some of the hillsides is so high that the picture elements 'spill over' down the columns of the picture.