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Background

Brief description of geomagnetism

About WMM

Main field model development, accuracy and limitations

Model & Software

Main field, model development, accuracy and test values

Online Calculators

Web-calulators for main field

Maps

Browse imagery and contour maps for main field and secular change

Uses of WMM

Common applications of WMM

License

License and copyright information

Online Calculators for the World Magnetic Model

Single Point Calculator

DoD World Magnetic Model Single Point Calculator (2010 - 2015)
This web-calculator will produce output for a single point for a range of dates. Select the WMM2010 radio button to get results from the World Magnetic Model.

Input And Output

The input parameters and valid entries are:

Latitude -90.00 to +90.00 degrees
Longitude -180.00 to +180.00 degrees
Altitude referenced to the WGS 84 ellipsoid
Date January 1, 2010 to December 31, 2014.

The seven magnetic components computed are:

F - Total Intensity of the geomagnetic field
H - Horizontal Intensity of the geomagnetic field
X - North Component of the geomagnetic field
Y - East Component of the geomagnetic field
Z - Vertical Component of the geomagnetic field
I (DIP) - Geomagnetic Inclination
D (DEC) - Geomagnetic Declination (Magnetic Variation)

Annual change in each of these magnetic components is also displayed. The annual change is computed by subtracting the main field values for the desired input date from main field values one year later. The output units are displayed using the abbreviations nT (nanoTesla), deg (degrees) and min (minutes) per year.

Grid Calculator

DoD World Magnetic Model Grid Calculator (2010 - 2015)
This web-calculator will produce output for a grid of points for a range of dates. It outputs as either XML or CSV. Select the WMM2010 radio button to get results from the World Magnetic Model.

Declination Calculator

DoD World Magnetic Model Declination Calculator (2010 - 2015)
This web-calculator will give declination for a single point. If HTML output is selected it includes a google map with sample compass. Select the WMM2010 radio button to get results from the World Magnetic Model.


Last Modified on: Thursday, 20-Feb-2014 16:28:37 MST
NOAA > NESDIS > NGDC
http://www.ngdc.noaa.gov/geomag/WMM/calculators.shtml
Maintained by: geomag.models@noaa.gov