Astrogeology Science Center

ISPRS 2003 Mars Transverse Mercator (MTM) Map Series Updated with Planetocentric Grid

The Mars Transverse Mercator (MTM) Map Series has been used to publish geologic and controlled photomosaic maps of Mars since 1984. Traditionally maps were published using planetographic coordinates with positive west longitude. In recent years planetocentric coordinates with positive east longitude have become more widely used for some Mars planetary data. The MTM map series has been updated to use planetocentric coordinates with positive east longitude as the primary grid with a secondary grid showing the planetographic coordinates with positive west longitude. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.