The magnetic declination changes slowly with time. The Geological Survey of Canada's on-line magnetic declination calculator gives for your coordinates: 1995 10d 11m W 1998 10d 22m W 2000 10d 30m W You can get a DOS or Windows program for do-it-yourself use at http://geomag.usgs.gov/ -- Richard Langley Professor of Geodesy and Precision Navigation
On Wed, 11 Nov 1998, Greg Milsom wrote: >Is anyone aware of a shareware or freeware program available on the web >that will compute the magnetic variation for various Longitude and >Latitude coordinates? I am trying to orient my homemade dial and come up >with slightly different variations depending on who I talk to. Anywhere >from 9d W to 10.7d W. My coordinates are 39d N and 77d W. Is there a >'simple' or maybe not so simple formula that I could program an Excel >spreadsheet to calculate. Thanks. >-- > >Fiddler's Green >We Design and Install Renewable Energy Systems >"Solar Energy...Live the Good Life!" >Greg Milsom, Owner >PO Box 1200 >Bowie, Maryland 20718 >Phone/Fax: (301) 210-7669 >http://www.radix.net/~green > =============================================================================== Richard B. Langley E-mail: [EMAIL PROTECTED] Geodetic Research Laboratory Web: http://www.unb.ca/GGE/ Dept. of Geodesy and Geomatics Engineering Phone: +1 506 453-5142 University of New Brunswick Fax: +1 506 453-4943 Fredericton, N.B., Canada E3B 5A3 Fredericton? Where's that? See: http://www.city.fredericton.nb.ca/ ===============================================================================
