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I presume your question is how to convert a compass reading to a map reading. If so read on...

1. Determine if magnetic north points to the east or west of true north in your location. (See magnetic declination)

2. If you think of easterly declinations as always having positive values and

westerly declinations as having negative values - imagine a directed number line where values to the right (East) of 0 (which we will call True North) are positive and numbers to the left (West) are negative.

Now all one need remember is this mnemonic - MTA (Magnetic to True ADD).

Example 1: Magnetic Heading is 23 degrees in an area where East Decl. is 7 degrees. True North = 23 + 7 = 30 degrees

Example 2: Magnetic Heading is 150 degrees in an area where West Decl. is 14 degrees. True North = 150 + (-14) = 136 degrees

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14y ago

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Related Questions

What if true north and magnetic north meet?

nothing special except with a compass you could find your way to the true north pole


Where can you find information on the angular relationships of true north grid north and magnetic north?

The declination diagram


Where can you find the information on angular relationships of true North grid North and magnetic north?

The declination diagram


Where do you find information on the angular relationships of true north grid north and magnetic north?

The declination diagram


Where can you find information of the angular relationships of true north grid north and magnetic north?

The declination diagram


Do I add or subtract the declination constant for Dallas Texas to find true north?

You don't need to worry about declination to find true north; just observe the north star, and that's it. Perhaps you're starting with a magnetic compass and want to find true north? The correction factor is "magnetic variation", or "magvar", and this is printed on your charts.


A way to find the variation from true north?

To find the variation from true north, you can use a magnetic compass to determine the magnetic north and then calculate the angle between the magnetic north and the true north. This angle is known as the magnetic declination or variation. Many maps and GPS devices provide information about the current magnetic declination in a specific location.


How do you determine true north without a compass at night?

One method to determine true north without a compass at night is by using the stars. You can locate the North Star (Polaris) which is positioned close to true north. Draw an imaginary line from the North Star to the ground to find where true north lies.


What does orienting mean on a map?

It means turning it around so that it is aligned with the real world. You'd use a compass for this to find magnetic north, then find true north and then align the map north to that


How do you find the direction in a topographic map?

Look for the compass rose, it will point North. Also look for the table that shows map north, true north and magnetic north.


True north refers to?

True north refers to the geographic direction towards the North Pole, where all lines of longitude converge. It is a fixed point used for navigation and orientation, unlike magnetic north which varies based on the Earth's magnetic field.


Does gps indicate true north or magnetic north?

True North