{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949503,-0.313758,0.000000,0.000000,0.175533,-0.531205,0.828860,0.000000,-0.259513,0.785345,0.562038,0.000000,-1656959.220969,5014343.677138,3564525.806136,1],    "boundingVolume": {    "region": [1.889932,0.596841,1.889956,0.596854,0.000000,7.379607]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/7/21.b3dm"}}}