{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.858446,-0.512905,0.000000,0.000000,0.262635,-0.439570,0.858953,0.000000,-0.439782,0.736061,0.514593,0.000000,-2807479.447525,4698863.588265,3263067.908245,1],    "boundingVolume": {    "region": [2.109279,0.540471,2.109443,0.540596,0.000000,44.774900]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/8_267318.b3dm"}}}