{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949128,-0.314889,0.000000,0.000000,0.116096,-0.349933,0.929553,0.000000,-0.292438,0.881455,0.370833,0.000000,-1866067.416158,5624631.893610,2350469.380854,1],    "boundingVolume": {    "region": [1.891082,0.379848,1.891191,0.379963,0.000000,67.498375]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/15/21_448.b3dm"}}}