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  • NCEI Geomagnetic Calculators - National Oceanic and Atmospheric . . .
    NOAA's National Centers for Environmental Information (NCEI), formerly the National Geophysical Data Center, and the collocated World Data Service for Geophysics, Boulder, operated by NOAA NESDIS NCEI, archive and make available geomagnetic data and information relating to Earth's magnetic field and Earth-Sun environment, including current
  • Magnetic Declination Calculator
    The magnetic declination calculator tells you the difference between true north and magnetic north at your location We use magnetic declination for many applications, including navigation, orienteering, planning, and not getting lost!
  • Magnetic declination calculator - Canadian GIS Geomatics
    Natural Resources Canada provides a free online magnetic declination calculator that can be used to calculate magnetic declination for any location and date based on the International Geomagnetic Reference Field model
  • Magnetic Declination Calculator - Accurate Magnetic Variation Tool for . . .
    Calculate magnetic declination easily with our Magnetic Declination Calculator Get accurate results for your location and improve navigation for hiking, camping, and outdoor activities Use our free online tool to find magnetic variation and enhance your compass readings today!
  • Online calculator: Compass, magnetic and true course calculator
    Compass, magnetic and true course calculator Calculates true, magnetic and compass direction (course, bearing) by a given direction, magnetic declination and deviation
  • Magnetic Declination Calculator (MagDec) - Earth Survey
    MagDec is a graphical front end for the NCEI online Magnetic Field Calculators that eliminates the need to input geodetic coordinates and displays the calculated magnetic declination and secular variation in a placemark balloon
  • Declination Reference Sheet Design - Map Tools
    This page allows you to look up current values for Magnetic Declination and Grid Varience for any location Then you can see what changes as you select various combination of north references to use on your maps and with your compass
  • Magnetic Declination (Variation) | NCEI - National Oceanic and . . .
    Magnetic declination (variation) calculator based on the IGRF magnetic field model Estimates magnetic delination world-wide from 1900 - present
  • Magnetic Declination Calculator
    Magnetic declination, also known as magnetic variation, is the angle on the horizontal plane between magnetic north (the direction the north end of a compass needle points) and true north (the direction along the Earth’s surface towards the geographic North Pole)
  • Declination Calculator - National Centers for Environmental Information
    Declination is calculated using the current World Magnetic Model (WMM) or International Geomagnetic Reference Field (IGRF) model While results are typically accurate to 30 minutes of arc, users should be aware that several environmental factors can cause disturbances in the magnetic field





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