{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950745,-0.309975,0.000000,0.000000,0.173175,-0.531158,0.829386,0.000000,-0.256548,0.786876,0.561257,0.000000,-1638024.929124,5024102.443320,3559565.663938,1],    "boundingVolume": {    "region": [1.885890,0.595794,1.886035,0.596014,0.000000,8.651848]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/15/12_1339968.b3dm"}}}