In about every five years, the U.S. National Oceanic and Atmospheric Administration (NOAA) and the British Geological Survey update the World ... is actually a map of Earth’s magnetic field.

The World Magnetic Model, which predicts the difference between magnetic north and true north at every ... themselves using services like Google Maps. The update has been planned for years ...

The Earth's magnetic ... the world's magnetic field is going to move. "Smartphone and consumer electronics companies rely on the WMM to provide consumers with accurate compass apps, maps, and ...