{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950051,-0.312096,0.000000,0.000000,0.174275,-0.530511,0.829570,0.000000,-0.258361,0.786477,0.560985,0.000000,-1649601.973582,5021549.270083,3557833.343146,1],    "boundingVolume": {    "region": [1.888113,0.595509,1.888277,0.595640,0.000000,8.648813]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/9/15_1456063.b3dm"}}}