You need to specify latitude/longitude as a specific relationship relative to a specific reference surface. Polar coordinates alone are insufficient for consist

You need to specify latitude/longitude as a specific relationship relative to a specific reference surface. Polar coordinates alone are insufficient for consistent addressing. For example, you could specify the latitude/longitude be interpreted as geodetic coordinates relative to the WGS84 ellispoid, neither of which will always be true when working with unspecified polar coordinates.