{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950747,-0.309968,0.000000,0.000000,0.173164,-0.531136,0.829402,0.000000,-0.256547,0.786893,0.561234,0.000000,-1638020.220428,5024210.930485,3559415.713727,1],    "boundingVolume": {    "region": [1.885883,0.595766,1.886028,0.595985,0.000000,8.813958]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/15/12_1422080.b3dm"}}}