page_title: Sinuosity
section_title: Notable values
hierarchical_section_title: Sinuosity / Notable values
caption_attribution_description: Français&#160;: Courbe de 2 trois-quart de cercles inversés disposés en continu dérivable, avec une ligne droite joignant les 2 extrémités; exemple pour calculer la Sinuosité d'une telle courbe
context_page_description: Sinuosity, sinuosity index, or sinuosity coefficient of a continuously differentiable curve having at least one inflection point is the ratio of the curvilinear length and the Euclidean distance between the end points of the curve. This dimensionless quantity can also be rephrased as the "actual path length" divided by the "shortest path length" of a curve.
  The value ranges from 1 to infinity.
context_section_description: The sinuosity S of:
  2 inverted continuous semicircles located in the same plane is . It is independent of the circle radius;
  a sine function (over a whole number n of half-periods), which can be calculated by computing the sine curve's arclength on those periods, is 
  With similar opposite arcs joints in the same plane, continuously differentiable:
caption: Example with 270° angle
exif: {}