In tectonic geomorphology the Mountain front sinuosity index is one of the morphometric indexes.

Smf = Lmf/Ls

I have a DEM, so how do I use it to find the value?

According to this diagram do I have to digitize all the mountain front?

  • $\begingroup$ Question, because I am not an expert, how are these values calculated ? Could be as simple as choosing a contour line and then (length of the arc)/(length of chord connecting endpoints). In which case the question is already answered with Smf=Lmf/Ls ... $\endgroup$ – user22279 May 13 at 12:16
  • $\begingroup$ I tried using contour but in the above image the lines are not generated using contours. $\endgroup$ – Gokul Anand May 14 at 8:43

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