Height of Olympus Mons is given in this article as 27 km, but was given as 25 km in the [[Mars (planet) article. I have adjusted to make both articles read the same. BUT there is no mention of how these different heights are calculated. As there is no "sea level" on Mars, as there is no sea of free water, what height datum is used? On Mars is the height above mean surface level used or is the height based on elevation above surrounding landscape? I understand Olympus Mons sits in a depression 2 km below mean surface level - this would account for the 2 km discrepancy between the articles. -- kiwiinapanic 09:18 12 Jul 2003 (UTC)
