{

  "coordinates":[

    [-150.0,-50.0],

    [-143.334820,-37.425259],

    [-136.967818,-26.881417],

    // ... intermediate steps

    [136.967818,-26.881417],

    [143.334820,-37.425259],

    [150.0,-50.0]

  ],

  "type":"LineString",

  "cs":"89000",

  "dimensions":2,

  "corrections":[

    {

      "startIndex":0,

      "length":89,

      "lineType":"NURBS",

      "exactRepresentation":[

        [3.0,7.0,11.0], // D, N, K

        [ // knots:

          0.0,0.0,0.0,0.0,

          0.25,0.5,0.75,

          1.0,1.0,1.0,1.0

        ],

        // control points:

        [-150.0,-50.0,1.0],

        [-100.0,50.0,1.0],

        [-50.0,-100.0,1.0],

        [0.0,100.0,1.0],

        [50.0,-100.0,1.0],

        [100.0,50.0,1.0],

        [150.0,-50.0,1.0]

      ]

    }

  ],

  "extras":{}

}