code: func NewTerrainRequest(MASK uint64, LAT int32, LON int32, GRID_SPACING uint16) *TerrainRequest {
  	m := TerrainRequest{}
  	m.MASK = MASK
  	m.LAT = LAT
  	m.LON = LON
  	m.GRID_SPACING = GRID_SPACING
  	return &m
  }
docs: // NewTerrainRequest returns a new TerrainRequest