{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949138,-0.314860,0.000000,0.000000,0.116064,-0.349871,0.929580,0.000000,-0.292420,0.881490,0.370763,0.000000,-1865950.735461,5624855.189697,2350030.574123,1],    "boundingVolume": {    "region": [1.891052,0.379773,1.891160,0.379888,0.000000,65.359440]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/15/20_76826.b3dm"}}}