the mobile versions of both Google Maps and Google Earth automatically correct for magnetic declination and always show True North, although we couldn’t find any documentation to that effect.

During my more recent walks through the woods, on a whim I used a hand-held GPS unit to map ... and magnetic north (at a specific time and location on the Earth) is known as the magnetic declination.

Even smartphone and consumer electronics companies need an accurate model so that they can provide users with up-to-date maps ... the Eastern Hemisphere. Interestingly, magnetic north has been ...