{
  "name": "sinuosity",
  "type": "function",
  "groups": ["GeometryGroup"],
  "description": "Returns the sinuosity of a curve, which is the ratio of the curve length to the straight (2D) distance between its endpoints.",
  "arguments": [{
    "arg": "geometry",
    "description": "Input curve (circularstring, linestring)"
  }],
  "examples": [{
    "expression": "round(sinuosity(geom_from_wkt('LINESTRING(2 0, 2 2, 3 2, 3 3)')), 3)",
    "returns": "1.265"
  }, {
    "expression": "sinuosity(geom_from_wkt('LINESTRING( 3 1, 5 1)'))",
    "returns": "1.0"
  }],
  "tags": ["curve", "distance", "length", "endpoints", "sinuosity", "ratio", "straight"]
}