Calculate magnetic declination or variation values
International Geomagnetic Reference Field (IGRF) Model - File Exchange - MATLAB Central
North Pole Projections
WMM PAL on the App Store
Earth's Magnetic Field Calculators - Instructions | NCEI
Why We Balance Transit Needles – Brunton
GeoMagnetic Calculator
US Historic Declination Calculator - CKAN
World Magnetic Model - Model Limitations
Magnetic Declination, Models, Data and Services | NCEI
World Magnetic Model - Background
Coordinates 4.5 : World Magnetic Model Calculator — Mapnitude
World Magnetic Model | NCEI
Global Geomagnetic Models
Coordinates 4.5 : World Magnetic Model Calculator — Mapnitude
World Magnetic Model - Maps of Magnetic Elements
South Pole Projections
Magnetic Declination, Models, Data and Services | NCEI
World Magnetic Model 2020 Released | CIRES
Magnetic Declination | Magnetic Inclination - Magnetic Dip
Magnetic declination calculator
Updated World Magnetic Model To Be Released - GIS Lounge
