DIGITAL MAPS OF MARS

A cartographic digital model (DM) of Mars containing controlled image mosaics and topographic measurements has been prepared for distributio n on CD-ROM optical disks. This database is the product of an exhausti ve Mars cartography project based on data from the Viking Orbiter miss ions. It includes a radiometrically and geometrically controlled, phot ometrically modeled global image mosaic at a resolution of 1/256 degre es/pixel (231 m), a digital topographic model of the entire planet at a resolution of 1/64 degrees (about 1 km), a series of multispectral i mage mosaics, and selected high-resolution (greater than or equal to 7 m/pixel) image mosaics. This collection of 21 disks is expected to pr ovide support not only for primary scientific investigations of Mars b ut also for the scientific and engineering operations of future expedi tions to that planet.