Is there some way that I can digitize both the direction and the magnitude of a vector field accessible in JPEG format?

To clarify what I mean, I want to have the numerical value of: 1)magnitude and 2) direction of all the vectors in a meteorological map like this:

enter image description here

  • 2
    $\begingroup$ Do you mean you want to extract numeric data representing those arrows from the picture? $\endgroup$
    – xzczd
    Jun 10 '21 at 2:12
  • $\begingroup$ @xzczd Yes, exactly $\endgroup$ Jun 10 '21 at 21:33
  • $\begingroup$ interesting...it's probably possible to build a neural net that does it with some accuracy, but it might be quicker to build a sort of GUI tool that lets you move around the image and manually "trace" the arrows' endpoints with a mouse... $\endgroup$
    – thorimur
    Jun 12 '21 at 2:58

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