10-01-2013, 01:20 PM
Would anyone know how to calculate Magnetic Declination back through the years ie: I have an old hand drawn plan whos only ref. is magnetic North.
Lawrence.
Lawrence.
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Magnetic Declination
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10-01-2013, 01:29 PM
Try this Lawrence
http://www.ngdc.noaa.gov/geomagmodels/Declination.jsp
Keep on Fiddling!
10-01-2013, 01:31 PM
Hi Mark, that only goes back to 1900, I need to get back further.
Lawrence.
10-01-2013, 02:02 PM
Keep on Fiddling!
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