Calculate IGRF Corrected Data

This calculates IGRF corrected version of the magnetic data. It requires, as input, a magnetic dataset for an area as well as a digital elevation model. Since the IGRF correction relates to latitude and longitude, the projection of the input dataset is required.

Options

Input Projection

The choice of projection is obtained through a drop box. The first part of the entry on the drop box shows the datum, and the last part shows the projection.

Should you wish choose degrees, the entry will be Datum / Geodetic Geographic, where Datum is your local datum of choice.

IGRF Options

References

IGRF Code (Accessed 28 March, 2014, http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html), originally written in FORTRAN, was developed using subroutines written by A. Zunde (USGS), S.R.C. Malin & D.R. Barraclough (Institute of Geological Sciences, United Kingdom). Translated into C by Craig H. Shaffer. Rewritten by David Owens and maintained by: Stefan Maus (NOAA)