code: func (m *TerrainData) Pack() []byte {
  	data := new(bytes.Buffer)
  	binary.Write(data, binary.LittleEndian, m.LAT)
  	binary.Write(data, binary.LittleEndian, m.LON)
  	binary.Write(data, binary.LittleEndian, m.GRID_SPACING)
  	binary.Write(data, binary.LittleEndian, m.DATA)
  	binary.Write(data, binary.LittleEndian, m.GRIDBIT)
  	return data.Bytes()
  }
docs: // Pack returns a packed byte array which represents a TerrainData payload