{
  "name": "tapered_buffer",
  "type": "function",
  "groups": ["GeometryGroup"],
  "description": "Creates a buffer along a line geometry where the buffer diameter varies evenly over the length of the line.",
  "arguments": [{
    "arg": "geometry",
    "description": "input geometry. Must be a (multi)line geometry."
  }, {
    "arg": "start_width",
    "description": "width of buffer at start of line,"
  }, {
    "arg": "end_width",
    "description": "width of buffer at end of line."
  }, {
    "arg": "segments",
    "optional": true,
    "default": "8",
    "description": "number of segments to approximate quarter-circle curves in the buffer."
  }],
  "examples": [{
    "expression": "tapered_buffer(geometry:=geom_from_wkt('LINESTRING(1 2, 4 2)'),start_width:=1,end_width:=2,segments:=8)",
    "returns": "A tapered buffer starting with a diameter of 1 and ending with a diameter of 2 along the linestring geometry."
  }],
  "tags": ["varies", "buffer", "line", "diameter", "length"]
}