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I use decimal minutes format:

    $egMapsCoordinateNotation = Maps_COORDS_DM;

Example of code:

    * [[Coordinates::45° 0.001' N, 45° 0.001' E]]
    * {{ #show: {{ FULLPAGENAME }} | ?Coordinates }}

Result:

    * 45° 0.0010000000000332' N, 45° 0.0010000000000332' E
    * 45° 0.0010000000200705' N, 45° 0.0010000000200705' E 

For current GPS-based applications, there is far too many decimal digits. 3 (or 4) digits will be enough for Maps_COORDS_DM format.

For applications where higher precision is desirable, configuration settings could be implemented.