You searched for: Author National Geophysical Data Center Remove constraint Author: National Geophysical Data Center Subject Magnetic declination Remove constraint Subject: Magnetic declination Place New Jersey Remove constraint Place: New Jersey Place Delaware Remove constraint Place: Delaware Place Alaska Remove constraint Place: Alaska Place Connecticut Remove constraint Place: Connecticut Year 2010 Remove constraint Year: 2010
2010. National Geophysical Data Center. This map layer shows isogonic lines (lines of constant declination of the Earth's magnetic field), derived from the International Geomagnetic Refer... National Atlas of the United States.
2010. National Geophysical Data Center. This map layer shows isoporic lines (lines of equal annual change, or secular variation, in the declination of the Earth's magnetic field), derived... National Atlas of the United States.