Square references
        
            A square reference consists of at least a brigram for large squares and additionally a
            number of up to four digits depicting a sub square.
        
        The input format is not case sensitive and may contain spaces.
        Examples: BF ÄE 1 AK 02 bh1361
        
        Coordinates
        
            Coordinates consist of a latitude as the first component and longitude as the second. The
            components need to be separated by a comma (,).
        
        Coordinates may be entered in any of the official formats:
        
            - Degree/Minute/Second: 
52°26'23"N, 013°30'19"W 
            - Degree/Decimal Minute: 
52°26.383'N, 013°30.317'W 
            - Decimal Degree: 
52.43972, -13.50528 
        
        
            Directions can be either entered as compass points (N E
            S W or O for German "Ost") or as a leading
            sign (+/-). If neither is entered, a +
            leading sign will be assumed.
        
        
            Any special characters (° ' ") may be
            replaced by non-numerical characters like blanks, hyphens, letters or any other
            character, that is not a digit. The official symbols for arcminute (′)
            and arcsecond (″) are unfortunately not yet supported and will render
            the coordinate impossible to parse.
        
        
            Examples:
            
                52°26'23"N, 013°30'19"W 
                52°26'23''N, 013°30'19''W 
                52 26 23 N, 013 30 19 W 
                52-26-23N, 013/30/19W 
                52d26m23sN, 013'30'19'W 
                52 26 23, -013 30 19 
                52°26.383'N, 013°30.317'W 
                52 26.383N, 013 30.317 W 
                52.43972, -13.50528