1

This should be a basic geodesy question.

I have a requirement to calculate "bearing (magnetic)" between two points. Will the igismap Bearing Angle tool do the job or is there something more to consider give that there is a requirement for a "magnetic" bearing.

I am hoping for a web based solution.

Improve this question
1
  • If you don't find a web based solution then please use a new question to seek an ArcGIS Desktop one or if this gets no answers you could edit "web based" out and ArcGIS Desktop in.
    – PolyGeo ♦
    Nov 14, 2019 at 0:22

1 Answer 1

Reset to default
1

Yes, there is something more to consider: the Magnetic Declination.

This is a scalar variable, derived from a physical property: the Earth's magnetic field.
It is variable dependant to location and time.

1

Magnetic Bearing will be the True Bearing plus the Magnetic Declination, for that point and that date.

MB = TB + MD

There are some web resources in the External links section of the Magnetic declination Wikipedia page.

I leave here the link to the Declination calculator of the National Geophysical Data Center.

Improve this answer
2
  • Out of interest, why does the title reference US/UK when it's the entire planet shown?
    – badgerseatfrogs
    Dec 3, 2019 at 3:59
  • 1
    The Model is for the World. US/UK are the producers of the information.
    – Gabriel De Luca
    Dec 3, 2019 at 4:37

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.