Each color cycle corresponds to 100 meters. Water is often strange looking due to various processing errors in these areas. The most squigley areas are mountains.
Jeff Klein, Ernesto Rodriguez, Thierry Michel, Marcos Alves, Richard Carande (now of Vexcel Corporation) and Howard Zebker of JPL, in cooperation with the NASA/JPL AIRSAR group, constructed this movie - thanks for letting me put it on-line!