<p>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? </p>

CC BY-SA 3.0
2014-11-13T04:38:52.697Z
do you get to use detailed topographical maps? or are we talking flat ground?  This question might get better answers in GIS stack exchange.
f.thorpe
CC BY-SA 3.0
2014-11-13T10:26:15.260Z
The condition of "start with your known latitude and longitude" makes me think that the questioner actually wants to know about [inertial navigation systems](http://en.wikipedia.org/wiki/Inertial_navigation_system), 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.
Pont
CC BY-SA 3.0
2014-11-13T16:36:41.857Z
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?
Semidiurnal Simon
<measurements>
Determine Latitude and Longitude without a GPS
Brian Bass
# Determine Latitude and Longitude without a GPS

(Asked by: username_0 on 2014-11-13)

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?

**Tags:** measurements

> **Comments:**
> **username_1**: do you get to use detailed topographical maps? or are we talking flat ground?  This question might get better answers in GIS stack exchange.  
> **username_2**: The condition of "start with your known latitude and longitude" makes me think that the questioner actually wants to know about [inertial navigation systems](http://en.wikipedia.org/wiki/Inertial_navigation_system), 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.  
> **username_3**: There are lots of questions here. Voting to close as "unclear what you're asking". username_0, perhaps you could narrow it down to one clear question?  

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