Distances cited are great-circle distances on the earth, with correction for the fact that the earth is slightly non-spherical.
Default is currently the WGS84/NAD83 datum. Latitude and longitude can be entered by degrees and minutes in the separate boxes provided, or as decimal degrees by entering a number like "39.999535" in the degrees box and leaving the minutes and seconds boxes empty.) Minutes or seconds can also contain decimal points.
Alan Eliasen was born 16192 days, 15 hours, 28 minutes ago.
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