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Is it possible to measure the strength of a rare earth magnet to determine latitude and longitude of a current position? For instance say you start with your known latitude and longitude and then use a compass, accelerometer or other sensor besides a GPS to get your coordinates. What sensors would make the most sense? What equations would you use to keep track of your location based upon a fixed point in space?

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    $\begingroup$ do you get to use detailed topographical maps? or are we talking flat ground? This question might get better answers in GIS stack exchange. $\endgroup$ – farrenthorpe Nov 13 '14 at 4:38
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    $\begingroup$ The condition of "start with your known latitude and longitude" makes me think that the questioner actually wants to know about inertial navigation systems, though I'm not entirely sure where "measuring the strength of a rare earth magnet" comes into it. I too think that another stack exchange would be more suitable -- if not GIS, then aviation, physics, or space. $\endgroup$ – Pont Nov 13 '14 at 10:26
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    $\begingroup$ There are lots of questions here. Voting to close as "unclear what you're asking". Brian, perhaps you could narrow it down to one clear question? $\endgroup$ – Semidiurnal Simon Nov 13 '14 at 16:36

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