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Questions tagged [declination]

magnetic declination is the angle between True North and Magnetic North, measured positive clockwise

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1 answer
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Sanity check for a declination chart on a QGIS map

I'm making a declination chart (True North -> Grid North -> Magnetic North) for a map I plan on using, and I need some sanity check from the community: The convergence from True to Grid north is ...
SubXi's user avatar
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1 answer
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sundials various Technicalities

when placing a certain type of sundial one needs to point it at true north as apposed to magnetic or the other one.That being said if the meridian line of true north for the location in question is ...
Michael 's user avatar
2 votes
0 answers
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NOAA Magnetic Field Component Grid Calculator Help

I am using NOAA's magnetic field component grid calculator trying to calculate the magnetic declination of the entire United States (here's the help page). Essentially, the link asks for a minimum ...
John Lexus's user avatar
3 votes
2 answers
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Does Magnetic Deviation depend on altitude? [closed]

Magnetic declination, sometimes called magnetic variation, is the angle between magnetic north and true north. Declination is positive east of true north and negative when west. Magnetic ...
Federico Gentile's user avatar
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1 answer
352 views

Make a Declination Arrow for Data Driven Pages?

I am making a map book over a large area and want to add a correct declination arrow for every page. I have not found a way in ArcGIS to make a declination arrow (in 10.3). I could make my own using ...
Donitza's user avatar
3 votes
1 answer
701 views

Magnetic declination - which magnetic model to choose?

which model to determine the magnetic declination is more accurate WMM (2014-2019) or IGRF (1590-2019)? I just wanted to determine the magnetic declination for calibration TruPulse Laser Rangefinder. ...
Onosz's user avatar
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3 votes
1 answer
838 views

Declination Diagram

What point on a UTM map does the declination diagram refer to? Is it the centre? Is it the edges? Is there a standard? The central meridian on a UTM map points to true north. Are grid north and true ...
Jeff George's user avatar
5 votes
1 answer
17k views

Applying proper conversion from True to Grid bearing

Assume that Grid North is 1.49 deg W of True North. Also, the magnetic declination is 13.11 deg. If I wanted to take gyroscopic surveys (measured from True North) and then convert them to Grid ...
Mr. Cox's user avatar
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4 votes
2 answers
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How to Calculate North?

I am working on a field survey and a client requirement is to differentiate various norths, like magnetic north, true north and grid north. My question is what is the methodology of calculating north ...
Mahesh Jadhav's user avatar