Mars Express/MARSIS map of Martian northern hemisphere
A pole-to-equator map of the Martian northern hemisphere, displayed in polar stereographic projections. The map is colour-coded to indicate the MARSIS mean dielectric constant of a number of geological units.
For further details see Mouginot, J., et al., "Dielectric map of the Martian northern hemisphere and the nature of plain filling materials", 2012, Geophysical Research Letters, 39, L02202. DOI:10.1029/2011GL050286