code: func NewBound(west, east, south, north float64) *Bound {
  	return &Bound{
  		sw: &Point{math.Min(east, west), math.Min(north, south)},
  		ne: &Point{math.Max(east, west), math.Max(north, south)},
  	}
  }
docs: // NewBound creates a new bound given the parameters.