The Mission Experiment Gridded Data Record (MEGDR) archive contains topographic maps of Mars generated using altimetry data acquired by MOLA and accumulated over the whole primary Mars Global Surveyor (MGS) mission.

Citation Smith, D.E., M.T. Zuber, G.A. Neumann, E.A. Guinness, and S. Slavney, Mars Global Surveyor Laser Altimeter Mission Experiment Gridded Data Record, MGS-M-MOLA-5-MEGDR-L3-V1.0, NASA Planetary Data System, 2003.
Data Set Abstract The Mars Global Surveyor spacecraft includes a laser altimeter instrument. The primary objective of the Mars Orbiter Laser Altimeter (MOLA) is to determine globally the topography of Mars at a level suitable for addressing problems in geology and geophysics. The MOLA Experiment Gridded Data Record (EGDR) is a topographic map of Mars based on altimetry data acquired by the MOLA instrument and accumulated over the course of the mission. The Mission Experiment Gridded Data Record (MEGDR), consists of data accumulated over the whole primary mission.
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    Additional Information
    Mission Information MARS GLOBAL SURVEYOR
    Data Set Information MGS-M-MOLA-5-MEGDR-L3-V1.0
    Instrument Host Information MGS
    Instrument Information MOLA
    Target Information MARS