Latitude shift

[TheHarleyMan2]

Hello, does anyone know the difference between the longitude and latitude of 1855 compared to todays longitude and latitude? I tried to calculate the difference and I am having a hard time trying to figure it out. I know of over the years the degrees change for true north. But does both longitude and latitude change?

 

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[Mackaydon]

Longitude, the 180 degrees E or W of a fixed point on Earth, does not fluctuate; nor does latitude (zero to ninty degrees) fluctuate as measured from the Equator to the Poles.
As has been mentioned above, the point from where longitude is measured (zero degrees east and west) can be anywhere--and has varied with different cultures. Today we use the degrees East or West from Greenwich, England.

Also mentioned above is that fact that the Magnetic North Pole is not a fixed point, but fluctuates with time and location. To determine the variance of the magnetic longitude of your position relative to a previous time, you need to know the total deviation of the true NP from the MNP at that spot from the previous date to today's date. Charts will normally show that annual deviation and you can guesstimate from there. Others on this board are far more able to be more percise than I, and I look forward to reading their responses.

 

[FISHEYE]

"Light refraction through the atmosphere has changed over the years due to global warming, pollution, the use of propellants in aerosols (darn hairspray manufacturers!) and may also have affected recording of Lat. and Long. during early surveys when celestial bodies were viewed through a sextant."

This is a myth.no scientific data to back it up.do you believe everything the media has to say?

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