RequestType() An enum identifying the type of request. Used for finer grained logging and priority sorting. Members staticconstantCesium.RequestType.IMAGERY : Number Imagery request. staticconstantCesium.RequestType.OTHER : Number Other request. staticconstantCesium.RequestType.TERRAIN : Number Terrain request. staticconstantCesium.RequestType.TILES3D : Number 3D Tiles request.