code: func (c *Coordinate) Clone() *Coordinate {
  	vec := make([]float64, len(c.Vec))
  	copy(vec, c.Vec)
  	return &Coordinate{
  		Vec:        vec,
  		Error:      c.Error,
  		Adjustment: c.Adjustment,
  		Height:     c.Height,
  	}
  }
docs: // Clone creates an independent copy of this coordinate.