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4.3. Specifying latitude and longitude on command lines

To specify an observer's location, humans will want to work in latitude and longitude in degrees, optionally with minutes and seconds. Latitudes are expressed as an angle followed by letter N or S (case-insensitive); longitudes are expressed as an angle followed by letter E or W. For the syntax of angles, see Section 4.2, “Specifying angles on command lines”.

Examples:

34d08m42sn 107d50m37sw
41.86333N 78.961389W