In cartogram maps, the image of the map is designed to match the variant being map, so the physical geography, as a result, is distorted, as displayed above.
This is a remote sensing KML image reflecting the average precipitation over a period of thirty days in 2007 (around June) with the moderate amounts of rainfall shown by the green regions and the most rain depicted in the dark red areas. This type of information is produced by using infrared emulsion receptive to wavelengths that are indiscernible to human vision, as well as microwaves and visible waves.