{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950042,-0.312123,0.000000,0.000000,0.115742,-0.352297,0.928704,0.000000,-0.289601,0.881488,0.372975,0.000000,-1847974.699610,5624870.038185,2364062.711736,1],    "boundingVolume": {    "region": [1.888145,0.382149,1.888302,0.382278,0.000000,6.299215]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/9/1_63421.b3dm"}}}