- Mar 11, 2014
- 48,492
- 10,167
uhm, and the point of that is what? the gm angle for a map is different for each reason. I have seen that as large as 13 degrees and small as nearly 0. and those were on maps old as 50 years. yet I found simple markers no bigger then a foot in width(sign) on a picket fence via walking to from 5 to 6 kilometers away.Ah yes, the evil of inflation.
Divers weights, and divers measures, both of them are alike abomination to the LORD. Proverbs 20:10 KJV
So a polar radius versus a meridian that spans at least 10% of the earth's quadrant. Using Lorentz Coordinate Transformations to calculate relativistic flattening of terra's oblong spheroidal shape for observers at un-accelerated space time continuum coordinates.
Then one must consider attenuation of the earth's magnetic field...
the gold standard is another topic. going to gold doesn't guarantee one will have money.
the compasses in America point to either new York's long island or another location. true north isn't even on the planet that is Polaris. ships navigate by that and pilots as well. compasses are used by whom?
http://en.wikipedia.org/wiki/Magnetic_declination
http://en.wikipedia.org/wiki/True_north
so again for most of us that makes no difference. air craft have means of accounting for that. the earth isn't constant and I think god made it that way with allowance for deviations. life and nature are that way. my average body temp is usually below 98.6, often its 98.3,97.8. that is normal, its an average statement.
Polaris to true north is close enough per that link.