ah, i also find this perl module Geo::Calc to help me calculate the headings: https://metacpan.org/pod/Geo::Calc.

seems i just need to step through all the data and feed the right lats and longs to this module, very promising !

In reply to Re^7: Calculate aircraft headings from GPS data for google kml display by hujunsimon
in thread Calculate aircraft headings from GPS data for google kml display by hujunsimon

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