{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950042,-0.312122,0.000000,0.000000,0.174289,-0.530504,0.829571,0.000000,-0.258383,0.786471,0.560983,0.000000,-1649739.895860,5021512.732904,3557821.043818,1],    "boundingVolume": {    "region": [1.888140,0.595507,1.888304,0.595638,0.000000,8.648813]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/9/15_1456036.b3dm"}}}