Elevations over oceans / sea can become < 0. There is no way to decide whether an elevation of e.g. -100m is over land and justified or over sea below MSL. So currently all levels below 0 are estim...
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| Updated: Sep 30 2011 at 2:01 PM by KWB | Created: Sep 30 2011 at 8:50 AM by KWB